浴野 稔一Toshikazu Ekino

Last Updated :2022/12/01

所属・職名
大学院先進理工系科学研究科 教授
ホームページ
メールアドレス
ekinohiroshima-u.ac.jp
自己紹介
高温超伝導関連物質に関する研究を行っています。超伝導と競合する電子状態、特に高温超伝導におけるスピン・電荷密度波の生成は超伝導臨界温度の深刻な低下をもたらします。本研究では、典型的な高温超伝導体について電子状態の競合の様子を明らかにし、発現機構を解明するとともに超伝導臨界温度を向上させる手がかりを得ることを目指しています。そのために、超清浄結晶界面を利用したエネルギー高分解能を持つ低温裂開接合法と、極低温走査型トンネル顕微鏡(STM)による原子スケールでの局所電子状態の詳細な観測を行なっているのです。このような実験研究の意義としては、超伝導の本質を最も直接的な手段で調べている、ということになります。

基本情報

学位

  • 理学博士 (青山学院大学)
  • 理学修士 (青山学院大学)

教育担当

  • 【学士課程】 総合科学部 : 総合科学科 : 総合科学プログラム
  • 【博士課程前期】 先進理工系科学研究科 : 先進理工系科学専攻 : 量子物質科学プログラム
  • 【博士課程前期】 先進理工系科学研究科 : 先進理工系科学専攻 : 理工学融合プログラム
  • 【博士課程後期】 先進理工系科学研究科 : 先進理工系科学専攻 : 量子物質科学プログラム
  • 【博士課程後期】 先進理工系科学研究科 : 先進理工系科学専攻 : 理工学融合プログラム

担当主専攻プログラム

  • 総合科学プログラム

研究分野

  • 数物系科学 / 物理学 / 物性Ⅱ

研究キーワード

  • 超伝導
  • ナノスケール物理学
  • エネルギーギャップ
  • ブレークジャンクション
  • 走査トンネル顕微鏡・分光
  • トンネル現象
  • 高温超伝導電子状態
  • 鉄系高温超伝導
  • f電子系物質の物性

教育活動

授業担当

  1. 2022年, 教養教育, 1ターム, 物理学実験法・同実験I[2理物]
  2. 2022年, 教養教育, 2ターム, 物理学実験法・同実験II[2理物]
  3. 2022年, 教養教育, 3ターム, 基礎物理学I[1歯歯,1歯工]
  4. 2022年, 教養教育, セメスター(前期), 物理入門
  5. 2022年, 学部専門, 1ターム, 物理科学概論
  6. 2022年, 学部専門, 3ターム, 電磁気学II
  7. 2022年, 学部専門, 1ターム, 物質科学実験C
  8. 2022年, 学部専門, 1ターム, 物質科学実験法C
  9. 2022年, 修士課程・博士課程前期, 年度, 理工学融合特別研究(2022年4月博士課程前期入学者)
  10. 2022年, 修士課程・博士課程前期, セメスター(前期), 理工学融合特別演習A
  11. 2022年, 修士課程・博士課程前期, セメスター(後期), 理工学融合特別演習B
  12. 2022年, 修士課程・博士課程前期, 3ターム, 相関系計測論

研究活動

学術論文(★は代表的な論文)

  1. Specific heat and Tunneling Spectroscopy study of NbB2 with maximum T-c similar to 10K, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 76巻, 9号, 200709
  2. Nanoscale electronic structure of the layered nitride superconductors alpha-KxTiNCl and beta-HfNCly observed by scanning tunneling microscopy and spectroscopy, PHYSICAL REVIEW B, 85巻, 14号, 20120417
  3. Scanning-tunneling microscopy and break-junction spectroscopy on the superconducting Fe(Se, Te) single crystal, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 484巻, pp. 22-26, 201301
  4. ★, Tunneling break-junction measurements of the superconducting gap in Y2C3, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 484巻, pp. 52-55, 201301
  5. ★, STM/STS and break-junction tunneling spectroscopy of FeSe1-xTex, LOW TEMPERATURE PHYSICS, 39巻, 3号, pp. 265-273, 201303
  6. Superconducting beta-ZrNClx probed by scanning-tunnelling and break-junction spectroscopy, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 494巻, pp. 89-94, 201311
  7. Break-junction measurements of CeNiSn under magnetic fields, Physica B, 230巻, pp. 635, 19970401
  8. ★, Features of the energy gap above Tc in Bi2 Sr2Ca Cu2O8+d as seen by break- junction tunneling, Physical Review B, 60巻, 9号, pp. 6916, 19990401
  9. Observation of the Energy Gar above Tc in (Bi, Pb)2Sr2Ca2Cu2O10+d Using Break Junction Tunneling, Journal of Low Tempereture Physics, 117巻, 3-4号, pp. 359, 19990401
  10. Break Junctionでみた高温超伝導体Bi2Sr2CaCu2O8+8dのTc以上でのギャップ構造, 物性研究, 72巻, 4号, pp. 436, 19990401
  11. Superconducting energy gap of La1.85Sr0.15CuO4 single crystals from break-junction tunneling, Physica C, 263巻, pp. 249, 19960401
  12. Energy gap in Lu-substituted YbB12 proved by break junction, Physica B, 281&282巻, pp. 278-279, 20000801
  13. Tunneling Spectroscopy of the Kondo-semiconducting gap in YbB12, Physica B, 259-261巻, pp. 315-316, 19990801
  14. Electron-Tunneling Studies of the Cubic Kondo Semiconductors, Japanese Journal of Applied Physics, series 11巻, pp. 97-99, 19990801
  15. Giant Magnetoresistance in Ce2Fe17, Physical Review B, 56巻, pp. 13716-13719, 19970401
  16. Substitution effect on the unstable ferromagnet CeFe2, Physica B, 281&282巻, pp. 92-93, 20000401
  17. Hydrogen Absorption in La2-xSrxCuO4 with Mono-Layer CuO6 Octahedra., Physica B, 165-166巻, pp. 1529-1530, 19900401
  18. Carrier Localization in Hydrogen-Doped La1.9A1.1Cu2O6+y (A = Ca, Sr)., Supercond. Sci. Technol., 4巻, pp. S208-210, 19910401
  19. Feasibility of Electron Donation to the CuO2 Plane of Mono-layer Copper by Hydrogen Absorption., Physica C, 185-189巻, pp. 845-846, 19910401
  20. Latttice Instabilities and Superconductivity in La2-x(Ba,Sr)xCuO4., Springer Proc. in Phys. 60 The Physics and Chemistry of Oxide Superconductors eds Y. Iye and H.Yasuoka= Springer-Verlag Berlin= Heidelberg, Phys. 60巻, pp. 201-204, 19920401
  21. Hydrogenation Effects on Copper-Oxide Superconductors,, Special Issue of JJAP= Mechanism of Superconductivity 1992. Jpn. J. Appl. Phys., 7巻, pp. 34-40, 19920401
  22. Effect of Hydrogenation on YBa2Cu3O0.9 and Bi2Sr2CaCu2O8.2., Physica B, 194-196巻, pp. 1941-1942, 19940401
  23. Interaction of Hydrogen with YBa2Cu3O6.9, Bi2Sr2CaCu2O8.2 and La1.9Ca1.1Cu2O6 Ceramics., Proc of 6th Inter. Symp. on Superconductivity (ISSP’93)= Advances in Superconductivity= eds T. Fujita and Y. Shiohara= Springer-Verlag, 6巻, pp. 399-402, 19940401
  24. Superconducting Energy Gap in Quaternary Intermetallic Compound YNi2B2C., Physica C, 235-240巻, pp. 2529-2530, 19940401
  25. Superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8., Physica C, 235-240巻, pp. 1899-1900, 19940401
  26. Tunneling Measurements of the Energy Gap in CeRhSb and CeNiSn, Physica B, 206-207巻, pp. 837-839, 19950401
  27. Tunnelling spectroscopy of superconducting energy gap in RNi2B2C (R=Y and Lu), Phy. Rev. B 53, 53巻, pp. 5640-5649, 19960401
  28. Tunneling Spectroscopy of CeRhSb Single Crystal, Physica B, 223-224巻, pp. 444-446, 19960401
  29. Tunneling measurements of the superconductor Nd1.85Ce0.15CuO4, J. Low Tem. Phys., 105巻, pp. 563-568, 19960401
  30. Tunneling measurements of the superconducting gap in CeRu2, Czecho. J. Phys. 46 (1996)= Suppl. S2= p. 783-784., 46巻, pp. Suppl. S2, p. 783-784, 19960401
  31. Electron tunneling into superconducting CeRu2, Phys. Rev. B, 56巻, pp. 7851-7854, 19970401
  32. Tunneling Spectroscopy of the Kondo semiconductor Ce3Bi4Pt3, J. MAG. MAG. MAT., 177-181巻, pp. 379-380, 19980401
  33. Tunneling Spectroscopy of Bi2Sr2CuO6+y under Mahnetic Fields. Advaces in Superconductivity X, Proc. of the 10th Inter. Sympo. on Superconductivity= Springer - Verlag Tokyo, 10巻, pp. 183-186, 19980401
  34. Anomalous Magnetic and Transport Properties in Ce2Fe17 and Lu2Fe17, J. Magn. Soc. Japan 23 (1999) 108-110., 23巻, pp. 108-110, 19990401
  35. Gap Measurements of the Antiferromagnetic Compound Ce2Fe17, J. Magn. Soc. Japan, 23巻, pp. 111-113, 19990401
  36. Tunneling measurements of as grown Bi2Sr2CaCu2O single crystals, Physica B, 259-261巻, pp. 555-556, 19990401
  37. Magnetic-field Dependence of the Energy Gap in Bi2Sr2CuO6, Advance in Superconductivity XI= Proc. of the 11th Inter. Sympo. On Superconductivity= Fukuoka= 1998= Springer-Verlag= 1999., 11巻, pp. 169-172, 19990401
  38. Break-junction Measurements of the Energy Gap above Tc in Bi2Sr2CaCu2O8+, Advance in Superconductivity XI= Proc. of the 11th Inter. Sympo. On Superconductivity= Fukuoka= 1998= Springer-Verlag= 1999., 11巻, pp. 177-180, 19990401
  39. Break-Junction Spectroscopy of Ce(Fe,Co)2 Physica B 284-288 (2000) 1327-1328., Physica B, 284-288巻, pp. 1327-1328, 20000401
  40. Probing the normal-state gap in high-Tc superconductors by break-junction tunneling, J. Phys. and Chem. Solids, 62巻, pp. 149-152, 20010401
  41. Tunneling spectroscopy of various underdoped Bi2Sr2CaCu2O8+., Physica C, 357-360巻, pp. 130-133, 20010401
  42. Tunneling spectroscopy of the energy gap in semiconducting La1.98Sr0.02CuO4, Physica C, 357-360巻, pp. 158-161, 20010401
  43. Tunneling spectroscopy of the nornal-state gap in (Bi,Pb)2Sr2Ca2Cu3O10+d, Phys. Rev. B, 64巻, pp. 092510-1 to 4, 20010401
  44. Synthesize of the binary intermetallic superconductor MgB2 under hydrogen pressure, J. Alloys and Compounds, 335巻, pp. L21-L24, 20020401
  45. Energy gap in the Kondo semiconductor CeRhAs, Physica B, 312-313巻, pp. 221-223, 20020401
  46. Superconducting gap in polycrystalline MgB2 stdied by electron tunneling, Physica C, 378-381巻, pp. 229-233, 20020401
  47. Tunneling spectroscopy of MgB2 and Li0.5(THF)yHfNCl, Physica B, 328巻, pp. 23-25, 20030401
  48. Tunneling spectroscopy of the electron-doped layered superconductor Li0.48(THF)0.3HfNCl, Physica C, 388-389巻, pp. 573-574, 20030401
  49. Multiple-gap structure of the binary superconductor MgB2, Physica C, 388-389巻, pp. 147-148, 20030401
  50. Tunneling spectroscopy of the superconducting gap in MgB2., Phys. Rev. B, 67巻, pp. 094504-1 to 6, 20030401
  51. Possible application of carbon nanotubes to the field emission electron source for portable betatrons, Nucl.Instr.and Meth.in Phys.Res.=B109/110, A539巻, pp. 16-24, 20050401
  52. Break-junction tunneling spectra of MgB2 Influence of boron quality, Physica C, 426-431巻, pp. 450-453, 20050401
  53. Spin-dependent tunneling in a magnetic field for junctions involving normal and superconducting CDW metals, Acta Physica Polonica A, 109巻, pp. 477-484, 20060401
  54. Tunneling spectroscopy of AlB2 type silicide CaAlSi, Physica B, 383巻, pp. 80-81, 20060401
  55. Tunneling spectroscopy of single-crystal clathrate Ba8Ga16Sn30, Physica B, 383巻, pp. 126-127, 20060401
  56. Electron tunneling experiments on La-substituted Kondo semiconductor CeRhAs, Physica B, 383巻, pp. 26-27, 20060401
  57. Tunneling spectroscopy of the electron-doped superconductors MNCl0.7 (M= Hf, Zr), Physica C, 445-448巻, pp. 77-79, 20060401
  58. Spin dependent tunneling current in junctions involving CDW metals, Jpn. J. Appl. Phys., 45巻, pp. 2242-2245, 20060401
  59. Spin dependent splitting of the tunnel conductivity peaks in the magnetic field for junctions involving CDW metals, Physica B, 378-380巻, pp. 567-568, 20060401
  60. Tunneling measurements of CeRhAs single crystal, Physica B, 378-380巻, pp. 786-787, 20060401
  61. Current carrier localization and coulomb gap observed in SrPbO3-エ by transport measurements and tunnel spectroscopy, Physica B: Condensed Matter, 17巻, pp. 7407-7416, 20050401
  62. Tunneling spectroscopy of deintercalated layered nitride superconductors ZrNCl0.7, J. Phys. Soc. Japan, 74巻, pp. 2586-2591, 20050401
  63. Manifestations of inhomogeneity in MgB2: From specific heat to tunnel measurements, Physica B, 359-361巻, pp. 460-462, 20050401
  64. Enhancement of the paramagnetic limit for superconductors with charge-density waves, Physica C, 426-431巻, pp. 325-329, 20050401
  65. Point-contact spectroscopy measurements of binary superconductor MgB2, Physica C, 426-431巻, pp. 300-303, 20050401
  66. Electrical resistivity and tunneling anomalies in CeCuAs2, Physica B, 359-361巻, pp. 108-110, 20050401
  67. Spin-polarized electron tunneling between charge-density-wave metals, Low Temp. Phys., 31巻, pp. 59-72, 20050401
  68. Pauli effect of the magnetic field on superconductors with charge-density waves, Low Temp. Phys., 31巻, pp. 41-46, 20050401
  69. Superconducting energy gap from break-junction tunneling spectroscopy in the ternary silicide CaAlSi, Phys. Rev. B, 76巻, 10号, pp. 104508-(1-5), 20070901
  70. Charge-Density-Wave origin of Dip-Hump Structures in the Tunnel Spectra of Bi2Sr2CaCu2O8+d, Acta Physica Polonica A, 111巻, 4号, pp. 573-580, 20070401
  71. Evidence for the Fine Pseudogap at the Fermi Level in Al-based Quasicrystals, Journal of the Physical Society of Japan, 76巻, 3号, pp. 033707-(1-4), 20070301
  72. Analysis of the pseudogap-related structure in tunneling spectra of superconducting Bi2Sr2CaCu2O8+d revealed by the break-junction technique, Physical Review B, 76巻, 18号, pp. 180503-(1-4), 20071101
  73. Scanning tunnelling microscopy and spectroscopy of MgB2, Joural of Physics: Conference Series, 61巻, pp. 278-282, 20070501
  74. Observation of local barrier height and electronic structure on cuprate superconductor by STM/STS, Journal of Physics Conference Series, 100巻, pp. 052003/1-4, 20080301
  75. Nanoscale Modulation of Local Barrier Height on Bi-based Cuprate Superconductors Observed by Scanning Tunneling Microscopy/Spectroscopy, Journal of the Physical Society of Japan, 77巻, pp. 043705/1-4, 20080401
  76. STM Observation on Layered Nitride Superconductor KxTiNCl, Journal of Physics: Conference Series, 150巻, pp. 052251/1-4, 20090401
  77. Scanning Tunneling Microscopy/Spectroscopy on Multi-Layered Cuprate Superconductor Ba2Ca5Cu6O12(O1-xFx)2, Physica C, 469巻, pp. 1020-1023, 20090601
  78. Semiconducting gap of Nd1.85Ce0.15CuO4 revealed by break junction tunneling spectroscopy, Journal of Physics: Conference Series, 150巻, pp. 052046/1-4, 20090401
  79. Temperature-dependent pseudogap-like features in tunnel spectra of high-Tc cuprates as a manifestation of charge-density waves, Journal of Physics: Condensed Matter, 20巻, pp. 425218/1-15, 20080501
  80. Pseudogap-like phenomena in cuprates as a manifestation of charge-density waves, Acta Physica Polonica A, 114巻, pp. 59-66, 20080601
  81. Observation of local barrier height and electronic structure on cuprate superconductor by STM/STS, Journal of Physics: Conference Series, 100巻, pp. 052003/1-4, 20080501
  82. Tunnel spectra of junctions involving BSCCO and other cuprates: superconducting and charge-density-wave gapping, Physica C, 468巻, pp. 1145-1147, 20080601
  83. Charge-density-wave features in tunnel spectra of high-Tc superconductors, Journal of Physics: Conference Series, 150巻, pp. 052047/1-4, 20090401
  84. Tunneling spectroscopy of layered superconductors : intercalated Li0.48(C4H8O)xHfNCl and De-intercalated HfNCl0.7, The European Physical Journal B, 73巻, pp. 471-482, 20100201
  85. Scanning Tunneling Spectroscopy and Break Junction Spectroscopy on Iron-Oxypnictide Superconductor NdFeAs(O0.9 F0.1), Physica C, 470巻, pp. 1070-1072, 20101101
  86. Atomic-scale spot structures and gap distributions on apical-fluorine cuprate superconductor Ba2Ca5Cu6O12 (O 1-x Fx)2 observed by STM/STS, Physica C, 470巻, pp. S160-S162, 20101101
  87. Tunneling Break-Junction Spectroscopy on the Superconductor NdFeAs(O0.9F0.1), Physica C, 470巻, pp. S358-S359, 20101101
  88. STM/STS Measurements of the Layered Superconductor β-HfNCl1-x, Physica C, 470巻, pp. S725-S727, 20101101
  89. Atomic surface structures on multi-layered cuprate superconductor Ba2Ca4Cu5O10(O1-x Fx)2 observed by STM, Physica C, 471巻, pp. 698-700, 20111001
  90. Scanning tunneling microscopy on iron-chalcogenide superconductor Fe(Se,Te) single crystal, Physica C, 471巻, pp. 622-624, 20111101
  91. Competition of superconductivity and charge-density-waves in cuprates: recent evidence and interpretation, Advances in Condensed Matter Physics, 2010巻, pp. 681070(1-40), 20101001
  92. STM/STS Observation on Layered Nitride Superconductor alpha-(DDA)xTiNCl, Journal of Physics: Conference Series, 400巻, pp. 022112/1-4, 20121201
  93. Phase diagram for coexisting d-wave superconductivity and charge-density-waves; cuprates and beyond, Journal of Physics: Condensed Matter, 23巻, pp. 385701(1-22), 20110401
  94. d-Wave Superconductivity and s-Wave Charge Density Waves: Coexistence between Order Parameters of Different Origin and Symmetry, Symmetry, 3巻, pp. 1-47, 20110301
  95. Nano-scale stripe structures on FeTe observed by low temperature STM/STS, Physics Procedia, 45巻, pp. 85-88, 20130501
  96. Anisotropic transport and magnetic properties and magnetic-polaron-like behavior in CeTe2-x, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 69巻, 3号, pp. 937-944, 200003
  97. Tunneling spectroscopy of RTe2 (R = La, Ce) and possible coexistence between charge-density waves and magnetic order, PHYSICAL REVIEW B, 63巻, 3号, 20010115
  98. Magnetic and transport properties or the pseudobinary systems Ce(Fe1-xCox)(2) and (Ce1-ySc)Fe-2, PHYSICAL REVIEW B, 63巻, 5号, 20010201
  99. Observation of a pseudogap in alpha-AlMnSi by break-junction tunneling spectroscopy, JOURNAL OF NON-CRYSTALLINE SOLIDS, 312-14巻, pp. 513-516, 2002
  100. Tunneling spectroscopy of MgB2 and Li-0.5(THF)(y)HfNCl, PHYSICA B-CONDENSED MATTER, 328巻, 1-2号, pp. 23-25, 200304
  101. Tunneling spectroscopy of the superconducting gap in MgB2, PHYSICAL REVIEW B, 67巻, 9号, 20030301
  102. Tunneling measurements of superconducting NbB2, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 408巻, pp. 828-829, 200408
  103. Formation of midgap states and ferromagnetism in semiconducting CaB6, PHYSICAL REVIEW B, 69巻, 11号, 200403
  104. Enhanced paramagnetic limit of the upper critical magnetic field for superconductors with charge-density waves, JOURNAL OF PHYSICS-CONDENSED MATTER, 16巻, 21号, pp. 3681-3690, 20040602
  105. Multiple-gap features from break-junction tunneling in the superconducting MgB2, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 73巻, 7号, pp. 1902-1913, 200407
  106. Tunnel currents in charge-density-wave metal-insulator-charge-density-wave metal structures: Magnetic field-induced spin-splitting of the conductance peaks, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 73巻, 7号, pp. 1931-1937, 200407
  107. Energy gap structure in the binary superconductor MB2 (M = Nb and Mg), PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 412巻, pp. 266-269, 200410
  108. Paramagnetic effect of magnetic field on superconductors with charge-density waves, LOW TEMPERATURE PHYSICS, 31巻, 1号, pp. 41-46, 200501
  109. Spatially heterogeneous character of superconductivity in MgB2 as revealed by local probe and bulk measurements, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 426巻, pp. 230-233, 20051001
  110. Tunneling spectroscopy of layered nitride superconductors MNCl0.7 (M = Hf and Zr), PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 445巻, pp. 77-79, 20061001
  111. Evidence of the fine pseudogap at the fermi level in Al-based quasicrystals, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 76巻, 3号, 200703
  112. Dynamics and mechanism of oxygen annealing in Fe1+yTe0.6Se0.4 single crystal, SCIENTIFIC REPORTS, 4巻, 20140403
  113. Tunneling spectra of break junctions involving Nb3Sn, LOW TEMPERATURE PHYSICS, 40巻, 10号, pp. 925-928, 201410
  114. Variable electronic stripe structures of the parent iron-chalcogenide superconductor Fe1+dTe observed by STM-STS, PHYSICAL REVIEW B, 90巻, 22号, 20141202
  115. Tunneling Evidence for the Quasiparticle Gap in Kondo Semiconductors CeNiSn and CeRhSb, Physical Review Letters, 75巻, 23号, pp. 4262-4265, 19951204
  116. Observation of the gap distribution on multi-layered cuprate superconductor Ba2Ca4Cu5O10(O1-x, Fx)2 by STM/STS, Physics Procedia, 58巻, pp. 78-81, 20140923
  117. Break junction tunneling spectroscopy of superconducting FeSexTe1-x, Physics Procedia, 65巻, pp. 65-68, 2015
  118. Tunneling STM/STS and break-junction spectroscopy of the layered nitro-chloride superconductors MNCl (M = Ti, Hf, Zr), Journal of Physics Conference Series, 507巻, pp. 012010-1-012010-5, 2014
  119. Spatially inhomogeneous superconductivity in MgB2, First International Conference: Fundamental Problems of High-Tc superconductivity-FPS-04 (2004)
  120. Electron tunneling into superconducting CeRu2, Physical Review B, 56巻, pp. 7851-7854, 1997
  121. Neutron scattering study of antiferromagnetic correlations in CeNi1-xCoxSn, Physica B, 223-224巻, pp. 432-434, 1996
  122. Vacuum-tunneling spectroscopy of heavy-fermion compounds using a low-temperature tunnelling microscope, Czech. J. Phys., 46巻, pp. 797-798, 1996
  123. Neutron scattering study of antiferromagnetic correlations in the Kondo semiconductor CeNiSn, Journal of Physics Condensed Matter, 7巻, pp. 8009-8026, 1995
  124. Feature of the energy gap in YBa2Cu3O7 from break junction measurements, HIGH-TC SUPERCONDUCTIVITY AND TUNNELING PHENOMENA, pp. 25-28, 1995
  125. Combined break-junction tunneling and STM/STS studies of the β-tungsten-type superconductor Nb3Sn below and above Tc, Journal of Energy Challenges and Mechanics(Accepted&in print), pp. 1-6
  126. The spatial distributions of large gap-like structure on Fe(Se,Te) single crystals observed by STM/STS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 518巻, pp. 23-27, 20151115
  127. Hybridization gaps and antiferromagnetic gap in the Kondo semiconductors CeT2Al10 (T = Fe and Os) observed by break- junction tunneling spectroscopy, PHYSICAL REVIEW B, 92巻, 20号, 20151124
  128. Hybridization gaps and antiferromagnetic gap in the Kondo semiconductors CeT2Al10 (T = Fe and Os) observed by break-junction tunneling spectroscopy, PHYSICAL REVIEW B, 92巻, pp. 201113(R) 1-201113(R) 5, 2015
  129. Combined break-junction tunneling and STM/STS studies of the β-tungsten-type superconductor Nb3Sn below and above Tc, Journal of Energy Challenges and Mechanics, 2巻, pp. 138-142, 2015
  130. Influence of the spatially inhomogeneous gap distribution on the quasiparticle current in c-axis junctions involving d-wave superconductors with charge density waves, JOURNAL OF PHYSICS-CONDENSED MATTER, 28巻, 44号, pp. 445701_1-445701_10, 20161109
  131. ★, Doping effects on the hybridization gap and antiferromagnetic order in the Kondo semiconductor CeOs2Al10 studied by break-junction experiments, PHYSICAL REVIEW B, 95巻, 3号, 20170115
  132. ★, Multilayered cuprate superconductor Ba$_2$Ca$_5$Cu$_6$O$_{12}$(O$_{1-x}$,F$_x$)$_2$ studied by temperature dependent scanning tunneling microscopy and spectroscopy, Physical Review B, 95巻, pp. 174508_1-174508_11, 20170516
  133. Scanning Tunneling Microscopy and Spectroscopy of the Layered Nitride Superconductor a-NaxTiNCl, Physics Procedia, 81巻, pp. 73-76, 2016
  134. Interplay between hybridization gaps and antiferromagnetic gap in the hole-doped Kondo semiconductor Ce(Os1-yRey)2Al10, Journal of Physics; Conference Series, 807巻, pp. 012008_1-012008_6, 2017
  135. Quasiparticle conductance-voltage characteristics for break junctions involving d-wave superconductors: charge-density-wave effects, JOURNAL OF PHYSICS-CONDENSED MATTER, 29巻, 50号, 20171220
  136. ★, Gap features of layered iron-selenium-tellurium compound below and above the superconducting transition temperature by break-junction spectroscopy combined with STS, IOP Conference Series: Materials Science and Engineering, 369号, pp. 012024-1-012024-7, 20180725
  137. ★, STM/STS and break-junction study of multi-layered Ba2Can-1CunO2n(O,F)2(n=5,6) and underdoped Bi2Sr2CaCu2O8+δ superconductors with the similar Tc ~ 70 K, J. Energy Challenges and Mechanics, 5巻, 1号, pp. 1-16, 201807
  138. Multilayered cuprate superconductor Ba2Ca5Cu6O12(O1-x,F-x)(2) studied by temperature-dependent scanning tunneling microscopy and spectroscopy, PHYSICAL REVIEW B, 95巻, 17号, 20170516
  139. Interplay between hybridisation gaps and unusual magnetic orders in Kondo semiconductors CeT2Al10 (T = Ru and Os), PHILOSOPHICAL MAGAZINE, 99巻, 23号, pp. 2984-2999, 20191202
  140. Atomic structures and nanoscale electronic states on the surface of MgB2 superconductor observed by scanning tunneling microscopy and spectroscopy, LOW TEMPERATURE PHYSICS, 45巻, 11号, pp. 1209-1217, 20191127
  141. Break-junction tunneling spectra of Bi2212 superconducting ceramics: Influence of inhomogeneous d-wave-Cooper-pairing and charge-density-wave order parameters, LOW TEMPERATURE PHYSICS, 46巻, 4号, pp. 400-413, 202004
  142. d-Wave superconductivity and s-Wave charge density waves: Coexistence between order parameters of different origin and symmetry, Symmetry, 3巻, 4号, pp. 699-749, 20111201
  143. Specific heat and Tunneling Spectroscopy study of NbB2 with maximum T-c similar to 10K, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 76巻, 9号, 2007
  144. Nanoscale modulation of local barrier height on Bi-based cuprate superconductors observed by scanning tunneling microscopy/spectroscopy, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77巻, 4号, 2008
  145. Tunneling break-junction spectroscopy on the superconductor NdFeAs(O 0.9F0.1), Physica C: Superconductivity and its Applications, 470巻, SUPPL.1号, pp. S358-S359, 20101201
  146. STM/STS measurements of the layered superconductor β-HfNCl 1-x, Physica C: Superconductivity and its Applications, 470巻, SUPPL.1号, pp. S725-S727, 20101201
  147. The phase diagram for coexisting d-wave superconductivity and charge-density waves: cuprates and beyond, JOURNAL OF PHYSICS-CONDENSED MATTER, 23巻, 38号, 2011
  148. Nanoscale electronic structure of the layered nitride superconductors alpha-KxTiNCl and beta-HfNCly observed by scanning tunneling microscopy and spectroscopy, PHYSICAL REVIEW B, 85巻, 14号, 2012
  149. Scanning-tunneling microscopy and break-junction spectroscopy on the superconducting Fe(Se, Te) single crystal, Physica C: Superconductivity and its Applications, 484巻, pp. 22-26, 20130115
  150. Superconducting β-ZrNClx probed by scanning-tunnelling and break-junction spectroscopy, Physica C: Superconductivity and its Applications, 494巻, pp. 89-94, 20130624
  151. Dynamics and mechanism of oxygen annealing in Fe1+yTe0.6Se0.4 single crystal, SCIENTIFIC REPORTS, 4巻, 2014
  152. Tunneling spectra of break junctions involving Nb3Sn, Fizika Nizkikh Temperatur, 40巻, 10号, pp. 1182-1186, 20140101
  153. Variable electronic stripe structures of the parent iron-chalcogenide superconductor Fe1+dTe observed by STM-STS, PHYSICAL REVIEW B, 90巻, 22号, 2014
  154. The spatial distributions of large gap-like structure on Fe(Se,Te) single crystals observed by STM/STS, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 518巻, pp. 23-27, 2015
  155. Multilayered cuprate superconductor Ba2Ca5Cu6O12(O1-x,F-x)(2) studied by temperature-dependent scanning tunneling microscopy and spectroscopy, PHYSICAL REVIEW B, 95巻, 17号, 2017
  156. Interplay between hybridisation gaps and unusual magnetic orders in Kondo semiconductors CeT2Al10 (T = Ru and Os), PHILOSOPHICAL MAGAZINE, 99巻, 23号, pp. 2984-2999, 2019
  157. Atomic structures and nanoscale electronic states on the surface of MgB2 superconductor observed by scanning tunneling microscopy and spectroscopy, LOW TEMPERATURE PHYSICS, 45巻, 11号, pp. 1209-1217, 2019
  158. Nano-scale periodic structures and gap distribution in Pb-doped Bi2223 cuprate superconductors observed by STM/STS, SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 33巻, 9号, 2020
  159. Tunneling spectroscopy of layered superconductors: Intercalated Li 0.48(C 4H 8O) xHfNCl and De-intercalated HfNCl 0.7, European Physical Journal B, 73巻, 4号, pp. 471-482, 20100201
  160. Analysis of the pseudogap-related structure in the tunnel spectra of superconducting Bi2Sr2CaCu2O 8+δ revealed by break-junction technique, Low Temperature Physics, 34巻, 6号, pp. 409-412, 20080101
  161. Scanning tunnelling microscopy and spectroscopy of MgB2, Journal of Physics: Conference Series, 61巻, 1号, pp. 278-282, 20070401
  162. Tunneling spectroscopy of layered nitride superconductors MNCl0.7 (M = Hf and Zr), Physica C: Superconductivity and its Applications, 445-448巻, 1-2号, pp. 77-79, 20061001
  163. Tunneling spectroscopy of AlB2 type silicide superconductor CaAlSi, Physica B: Condensed Matter, 383巻, 1号, pp. 80-81, 20060815
  164. Electron tunneling experiments on La-substituted Kondo-semiconductor CeRhAs, Physica B: Condensed Matter, 383巻, 1号, pp. 26-27, 20060815
  165. Spin-dependent tunnel currents in junctions involving charge-density-wave metals, Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 45巻, 3 B号, pp. 2242-2245, 20060327
  166. Current carrier localization and Coulomb gap observed in SrPbO 3-δ by transport measurements and tunnel spectroscopy, Journal of Physics Condensed Matter, 17巻, 46号, pp. 7407-7416, 20051123
  167. Enhancement of the paramagnetic limit for superconductors with charge-density waves, Physica C: Superconductivity and its Applications, 426-431巻, I号, pp. 325-329, 20051001
  168. Point-contact spectroscopy measurements of binary superconductor MgB 2, Physica C: Superconductivity and its Applications, 426-431巻, I号, pp. 300-303, 20051001
  169. Spatially heterogeneous character of superconductivity in MgB2 as revealed by local probe and bulk measurements, Physica C: Superconductivity and its Applications, 426-431巻, I号, pp. 230-233, 20051001
  170. Tunneling spectroscopy of deintercalated layered nitride superconductor ZrNCl0.7, Journal of the Physical Society of Japan, 74巻, 9号, pp. 2586-2591, 20050901
  171. Manifestations of inhomogeneity in MgB2: From specific heat to tunnel measurements, Physica B: Condensed Matter, 359-361巻, SPEC. ISS.号, pp. 460-462, 20050430
  172. Energy gap structure in the binary superconductor M B2 ( M = Nb and Mg), Physica C: Superconductivity and its Applications, 412-414巻, SPEC. ISS.号, pp. 266-269, 20041001
  173. Tunneling measurements of superconducting NbB2, Physica C: Superconductivity and its Applications, 408-410巻, 1-4号, pp. 828-829, 20040801
  174. Multiple-gap features from break-junction tunneling in the superconducting MgB2, Journal of the Physical Society of Japan, 73巻, 7号, pp. 1902-1913, 20040701
  175. Tunneling spectroscopy of the electron-doped layered superconductor Li0.48(THF)0.3HfNCl, Physica C: Superconductivity and its Applications, 388-389巻, pp. 573-574, 20030501
  176. Multiple-gap structure of the binary superconductor MgB2, Physica C: Superconductivity and its Applications, 388-389巻, pp. 147-148, 20030501
  177. Tunneling spectroscopy of MgB2 and Li0.5(THF)yHfNCl, Physica B: Condensed Matter, 328巻, 1-2号, pp. 23-25, 20030401
  178. Semiconducting gap of Nd1.85Ce0.15CuO4 revealed by break-junction tunnelling spectroscopy, Journal of Physics: Conference Series, 150巻, 5号, 20090101
  179. Tunneling spectroscopy of the superconducting gap in MgB2, Physical Review B - Condensed Matter and Materials Physics, 67巻, 9号, pp. 945041-945046, 20030301
  180. Superconducting gap in polycrystalline MgB2 studied by electron tunneling, Physica C: Superconductivity and its Applications, 378-381巻, PART 1号, pp. 229-233, 20021001
  181. Energy gap in the Kondo semiconductor CeRhAs, Physica B: Condensed Matter, 312-313巻, pp. 221-223, 20020301
  182. Tunneling spectroscopy of various underdoped Bi2Sr2CaCu2O8+δ, Physica C: Superconductivity and its Applications, 357-360巻, pp. 130-133, 20010101
  183. Probing the normal-state gap in high-Tc superconductors by break-junction tunneling, Journal of Physics and Chemistry of Solids, 62巻, 1-2号, pp. 149-152, 20010101
  184. Tunneling spectroscopy of the energy gap in semiconducting La1.98Sr0.02CuO4, Physica C: Superconductivity and its Applications, 357-360巻, pp. 158-161, 20010101
  185. Energy gap in Lu-substituted YbB12 probed by break junction, Physica B: Condensed Matter, 281-282巻, pp. 278-279, 20000601
  186. Break-junction spectroscopy of antiferromagnetic Ce(Fe,Co)2, Physica B: Condensed Matter, 284-288巻, PART II号, pp. 1327-1328, 20000101
  187. Charge-density-wav features in tunnel spectra of high-T superconductors, Metrology and Measurement Systems, 15巻, 2号, pp. 145-151, 20081201
  188. Features of the energy gap above Tcin Bi2Sr2CaCu2O8+δas seen by break-junction tunneling, Physical Review B - Condensed Matter and Materials Physics, 60巻, 9号, pp. 6916-6922, 19990101
  189. Tunneling spectroscopy of the Kondo semiconductor Ce3Bi4Pt3, Journal of Magnetism and Magnetic Materials, 177-181巻, PART 1号, pp. 379-380, 19980101
  190. Scanning tunneling microscopy on iron-chalcogenide superconductor Fe(Se, Te) single crystal, Physica C: Superconductivity and its Applications, 471巻, 21-22号, pp. 622-624, 20111101
  191. Superconducting energy gap of La1.85Sr0.15CuO4 single crystals from break-junction tunneling, Physica C: Superconductivity and its Applications, 263巻, 1-4号, pp. 249-252, 19960101
  192. Competition of superconductivity and charge density waves in cuprates: Recent evidence and interpretation, Advances in Condensed Matter Physics, 2010巻, 20101201
  193. Scanning-tunneling microscopy/spectroscopy and break-junction tunneling spectroscopy of FeSe1-xTex, Low Temperature Physics, 39巻, 3号, pp. 265-273, 20130327
  194. Tunneling break-junction measurements of the superconducting gap in Y 2C3, Physica C: Superconductivity and its Applications, 484巻, pp. 52-55, 20130115
  195. Tunneling spectroscopy of Novel Layered superconductors: MgB2, Li0.48(THF)XHfNCl and related substances, Superconductivity: Theory, Materials and Applications, pp. 1-110, 20120301
  196. Tunneling STM/STS and break-junction spectroscopy of the layered nitro-chloride superconductors MNCl (M Ti, Hf, Zr), Journal of Physics: Conference Series, 507巻, PART 1号, 20140101
  197. Break-junction Tunneling Spectroscopy of Superconducting FeSexTe1-x, Physics Procedia, 65巻, pp. 65-68, 20150101
  198. Tunneling spectroscopy of the superconducting gap in (formula presented), Physical Review B - Condensed Matter and Materials Physics, 67巻, 9号, 20030314
  199. Gap features of layered iron-selenium-tellurium compound below and above the superconducting transition temperature by break-junction spectroscopy combined with STS, IOP Conference Series: Materials Science and Engineering, 369巻, 1号, 20180612
  200. Tunneling spectroscopy of the Kondo-semiconducting gap in YbB12, Physica B: Condensed Matter, 259-261巻, pp. 315-316, 19990101
  201. Tunneling measurements of as grown Bi2Sr2CaCu2O8+δ single crystals, Physica B: Condensed Matter, 259-261巻, pp. 555-556, 19990101
  202. Comparative study of superconducting and normal-state anisotropy in Fe1+yTe0.6Se0.4 superconductors with controlled amounts of interstitial excess Fe, PHYSICAL REVIEW B, 103巻, 22号, 20210602
  203. Tunneling and break junction spectroscopy of the ambient-pressure semiconducting and superconducting gap structures in the ladder compound (Sr, Ca)(14)Cu24O41, PHYSICAL REVIEW B, 104巻, 5号, 20210819

著書等出版物

  1. 2007年10月, Superconductivity Research Advances, Editor: James E. Nolan, COMPETITION BETWEEN SUPERCONDUCTIVITY AND CHARGE CARRIER LOCALIZATION IN PLUMBATES, NOVA SCIENCE PUBLISHERS, INC., 2007年, 10, 単行本(学術書), 共著, ENGLISH, A.M. Gabovich, V.A. Drozd, M. Pekala, T. Ekino, R. Ribeiro,, 978600216916, 55
  2. 2012年03月, Superconductivity: Theory, Materials and Applications, ed. by V.R. Romanovskií, he discovery of novel high-Tc superconductivity in MgB2 (Tc = 39.5 K) and Li0.48(THF)yHfNCl (Tc = 25.5 K) initiated substantial progress in the field of superconductivity physics and its applications despite the fact that competing high-Tc cuprates remain the world leaders in almost all practically important superconducting parameters. This article describes electron tunneling and point-contact experimental studies of the indicated two materials and related substances, being crucial to elucidate the character of the quasiparticle energy spectrum both in superconducting and normal state. The account is based mostly on our own experiments, although works carried out in other laboratories are taken into account as well. We studied superconducting gap structures by means of break-junction tunneling spectroscopy (BJTS), scanning tunneling spectroscopy (STS) and point-contact spectroscopy (PCS)., Tunneling Spectroscopy of Novel Layered Superconductors: MgB2, Li0.48(THF)xHfNCl and Related Substances, Nova Science Publishers, Inc. New York, 2012年, 03, 単行本(学術書), 共著, 9781613248430, 110
  3. 2015年08月01日, SUPERCONDUCTORS NEW DEVELOPMENTS, Ed. A.M. Gabovich, Gap Structures of A-15 Alloys from the Superconducting and Normal-State Break-Junction Tunnelling pp.55-72, 2015年, 単行本(学術書), 共著, 978-953-51-2133-6, 270, 22

招待講演、口頭・ポスター発表等

  1. 2020年12月02日, 通常, 英語
  2. STM/STS法及び裂開接合法によるPbドープBi2223超伝導体のトンルスペクトル観測, 杉本暁、大坪広典、松本凱斗、浴野稔一, 杉本暁、大坪広典、松本凱斗, 日本物理学会第76回年次大会, 2021年03月12日, 通常, 日本語
  3. 遷移金属元素をドープした鉄11系超伝導関連物質のSTM/STS観測, 大坪広典、杉本暁、浴野稔一, 大坪広典、杉本暁、浴野稔一, 日本物理学会第76年次大会, 2021年03月12日, 通常, 日本語
  4. alpha型層状窒化塩化物超伝導体Ax-TiNCl及び関連物質の低温走査型トンネル顕微鏡/分光法による状態密度測定, 松本凱斗、杉本暁、田中将嗣、浴野稔一, 松本凱斗、杉本暁、田中将嗣、浴野稔一, 日本物理学会第76年次大会, 2021年03月12日, 通常, 日本語, 日本物理学会, online
  5. 鉄11系超伝導体関連物質(Cu,Fe)Se0.4Te0.6の単結晶作製とSTM/STS観測, 大坪広典、杉本暁、浴野稔一, 大坪広典、杉本暁、浴野稔一, 応用物理物理系学会中国四国支部合同学術講演会, 2020年08月02日, 通常, 日本語
  6. 層状窒化塩化物超伝導体Ax-TiNCl(A=Na)の状態密度測定, 松本凱斗、杉本暁、田中将嗣、浴野稔一, 松本凱斗、杉本暁、田中将嗣、浴野稔一, 応用物理物理系学会中国四国支部合同学術講演会, 2021年08月02日, 通常, 日本語
  7. 梯子型物質(Sr, Ca)14Cu24O41のトンネル分光(III), 通常, 日本語
  8. Gap features of layered iron-selenium-tellurium compound below and above the superconducting transition temperature by break-junction spectroscopy combined with STS, 浴野稔一, A Sugimoto and A M Gabovich, 2018 Grobal Conference on Polymer and composite Materials PCM2018, 2018年04月11日, 招待, 英語, Global Conference on Polymer and Composite Materials, 北九州
  9. STM/STS study of the multi-layered flourine-substituted high-Tc superconductor Ba2Can-1CunO2n (O,F)2 (F02(n-1)n) (n=5,6), 浴野稔一, 2017年08月15日, 招待, 日本語
  10. COMBINED STUDY OF THE ENERGY GAP IN FeSexTe1-x SUPERCONDUCTOR BY BREAK-JUNCTION AND SCANNING TUNNELING SPECTROSCOPY, 浴野稔一, 2017年03月24日, 招待, 英語, 福岡, Single crystals of FeSexTe1-x superconductors were investigated by scanning tunneling microscopy/spectroscopy (STM/STS). We mainly focus on the compositions x = 0.4 – 0.5 showing the superconducting critical temperature Tc = 15 K. The BJTS method revealed a BCS-like gap structure with the values 2Δ (T ≈ 4 K) = 2.5 – 7 meV and the broadening parameter Γ < 0.1 Δ. The observed wide gap distribution can be due to either the local electronic inhomogeneity or the manifestations of the gaps from different Fermi surfaces. The largest normalized gap value becomes 2Δ/kBTc ≈ 5. From the STS measurements, the gap value 2Δ = 20 – 40 meV is detected locally in the superconducting state, which turns out to be much larger than that observed in the BJTS. Such a gap shape tends to appear at the excess Fe atoms in nm regions on the surface of iron-chalcogenide layer. In the high-bias BJTS, the samples with x = 0.4 – 0.5 demonstrate V-shape gaps at T ≈ 4 K with the peak intervals eVp-p = 4Σ = 80 – 160 meV. This hump structure forms the normal-state gap above Tc. Such behaviour is similar to the partially gapped density-wave superconductor involving both superconducting gap and pseudogap, which has been adapted to high-Tc cuprates [2]. Since the normal-state gap survives up to T* ≈ 60 – 100 K, the normalized gap value 2Σ/kBT* becomes ~ 9 - 13. Most probably, the normal-state gap is induced by charge-density waves, for which 2Σ/kBT* is anomalously high, as was observed for the quasi one-dimensional compounds [5]. These results suggest that the present normal-state gap is generated by the partial Fermi surface instability inherent to the low-dimensional electronic structures. The possible origins are discussed in terms of the local phase transition reducing the crystal symmetry due to strains and inhomogeneity. The mesurements of FeSe and non-superconducting FeTe will be also presented and discussed. [2] A.M. Gabovich, A.I. Voitenko, et al., Adv. Condens. Matter Phys. 2010, 681070 (2010). [3] T. Ekino, J. Akimitsu, Jpn. J. Appl. Phys. 26, 625 (1987).
  11. Combined study of FeSexTe1-x by break junction and scanning tunneling spectroscopy -Mutual comparison of BJTS and STS spectra-, EKINO Toshikazu, SUGIMOTO Akira, Alexander GABOVICH, IBS 2016 Advances in preparation and investigation of emergent Iron-Based Superconductors, 2016年05月23日, 招待, 英語, Leibniz Institute for Solid State and Materials Research Dresden B.Verkin Institute for Low Temperature Physics and Engineering, Dresden, Germany, We investigated the energy gap in FeSexTe1-x single crystal with the bulk superconducting critical temperature Tc = 15 K, which is considerably higher than that for the pure FeSe. The measurements were carried out in a wide temperature range below and above Tc by the break-junction tunneling spectroscopy (BJTS) to maintain a fresh and unaffected surfaces. The scanning tunneling microscopy/spectroscopy (STM/STS) technique was also employed to survey the complementary density-of-states data. The BJTS method dealing with SIS (superconductor - insulator - superconductor) junctions revealed a Bardeen-Cooper-Schrieffer-like gap structure with the values 2Δ (T ≈ 4 K) = 2.5 – 7 meV and the broadening parameter not less than 0.1 Δ [1]. The wide gap distribution was detected, which is believed to originate either form the local electron spectrum inhomogeneity or from the manifestations of the gap belonging to different Fermi surfaces [2]. The largest gap value from the distribution corresponds to 2Δ/kBTc ≈ 5 being similar to our BJTS results for NdFeAsOF with Tc = 48 K and suggesting the same kind of the strong-coupling Cooper pairing [3]. Besides the conventional superconducting gap features, the high-bias BJTS demonstrates a V-shape gap structure at T ≈ 4 K with the peaks at ± 40 – 80 mV. In some measurements, those features may also appear as humps outside the superconducting-gap peak in a manner similar to the observations in high-Tc cuprates [4]. STM/STS measurements show that such a V-gap appears at the excess Fe atoms on the surface of iron-chalcogenide layer, clustering in nm regions. Since the V-gap structure survives up to T* ≈ 60 – 100 K, the gap-to-T* ratio is in the range 8 – 13. This characteristic value shows that the high-energy gaps are not connected to superconductivity with the corresponding smaller gaps discussed above. Most probably, larger (normal-state) gaps are induced by charge density waves, for which the ratio between the energy gap at zero T to the critical temperature is anomalously high, as was demonstrated many years ago for the quasi one-dimensional conductors [5]. Those results suggest that the normal-state gap observed here is generated by the electron spectrum instability leading to the partial Fermi surface gapping, inherent to the low-dimensional electronic structures. The possible specific origin is discussed in terms of the structural/magnetic phase transition locally reducing the crystal symmetry of FeSexTe1-x, the distribution of T* being naturally understood as driven by the existence of local strains and inhomogeneity. [1] T. Ekino, K. Nagasaka, Y. Sakai, A. Sugimoto, A.M. Gabovich, Physics Procedia 65, 65(2015). [2] H. Miao, P. Richard, Y. Tanaka, et al., Phys. Rev. B 85, 094506 (2012). [3] T. Ekino, A. Sugimoto, H. Okabe, K. Shohara, R. Ukita, et al., Physica C 470, S358 (2010). [4] A.M. Gabovich, A.I. Voitenko, et al., Adv. Condens. Matter Phys. 2010, 681070 (2010). [5] T. Ekino, J. Akimitsu, Jpn. J. Appl. Phys. 26, 625 (1987).
  12. Scanning Tunnelling Microscopy and Spectroscopy on the Layered Nitride Superconductor α-NaxTiNCl, Akira Sugimoto , Yuta Sakai, Toshikazu Ekino, Shuai Zhang, Masashi Tanaka, Shoji Yamanaka, A. M. Gabovich, 28th International Symposium on Superconductivity, ISS 2015, 2015年11月18日, 通常, 英語
  13. 鉄セレン系超伝導体のトンネル分光 によるエネルギーギャップの測定, 長坂 康平, 杉本 暁, 浴野 稔一, 日本物理学会秋季大会, 2015年09月19日, 通常, 日本語
  14. 破断接合法トンネル分光で観測した近藤半導体CeOs2Al10の5d電子・正孔ドープによるギャップ構造の抑制, 川端丈A, 山田義大A, 高畠敏郎A, B, 坂井優太C, 杉本暁C, 浴野稔一C, 室裕司D, 日本物理学会 2015年秋季, 2015年09月17日, 通常, 日本語
  15. STM/STSを用いた鉄カルコゲナイド超伝導体母物質FeTeにおける周期的変調構造のバイアス電圧依存性, 杉本 暁*, 長坂 康平, 浴野 稔一, 日本物理学会秋季大会, 2015年09月16日, 通常, 日本語
  16. Tunnelling measurements of Nb3Sn break junctions below and above the superconducting critical temperature, T. EKINO, Fourth International Symposium on Energy Challenges and Mechanics - working on small scales, 2015年08月13日, 招待, 英語, North Sea Conference & Journal, Aberdeen, SCOTLAND, UK
  17. Break Junction Tunneling Spectroscopy of Kondo Semiconductors CeT2Al10(T = Fe, OS), J. Kawabata, Y. Yamada, T. Takabatake, Y. Sakai, A. Sugimoto, T, Ekino, Y. Muro, ICM2015, 2015年07月07日, 通常, 英語
  18. 破断接合法トンネル分光による近藤半導体CeT2Al10(T = Fe, Os)のギャップ構造の観測, 川端丈A,山田義大A,高畠敏郎A,B,坂井優太C,杉本暁C,浴野稔一C,室裕司D, 日本物理学会 第70回年次大会, 2015年03月23日, 通常, 日本語
  19. The spatial distributions of large pseudo gap on Fe(Se, Te) single crystals observed by STM/STS, A. SUGMOTO, T. EKINO, et al., International Symposium on Superconductivity (ISS2014), 2014年11月27日, 通常, 英語, Tokyo
  20. Break junction tunneling spectroscopy of superconducting FeSexTe1-x (x= 0.4-0.5) with our STM/STS result, T. EKINO, International Symposium on Superconductivity (ISS2014), 2014年11月27日, 通常, 英語, Tokyo
  21. 層状窒化物超伝導体NaxTiNClの電子状態密度の観測, 坂井優太, 杉本暁, S. Zhang, 田中将嗣, H. Zhu, 山中昭司, 浴野稔一, 日本物理学会秋季大会, 2014年09月09日, 通常, 日本語
  22. STM/STSによる鉄カルコゲナイド超伝導体FeSexTe1-xにおける過剰鉄スポット形状と電子状態の観測, 杉本暁, 坂井優太, 浴野稔一, 日本物理学会秋季大会, 2014年09月09日, 通常, 日本語
  23. トンネル分光による近藤半導体CeT2Al10(T = Fe, Os)の擬ギャップ構造の観測, 川端丈A,山田義大A,高畠敏郎A,B,坂井優太C,杉本暁C,浴野稔一C, 日本物理学会 2014年秋季大会, 2014年09月09日, 通常, 日本語
  24. Suppression of hybridization gap and antiferromagnetic order by electron- and hole- doping in the Kondo Semiconductor CeOs2Al10, J. KawabataA, Y. YamadaA, K. UmeoA,B, T. TakabatakeA,C, Y. MuroD, SCES2014, 2014年07月07日, 通常, 英語
  25. STS/STM of the layered iron-chalcogenide and nitro-chloride superconductors, T. EKINO, AnalytiX-2014, 2014年04月28日, 通常, 英語
  26. 層状窒化物超伝導体NaxTiNClのSTM/STS観測, 坂井優太, 杉本暁, S. Zhang, 田中将嗣, H. Zhu, 山中昭司, 浴野稔一, 日本物理学会年次大会, 2014年03月27日, 通常, 日本語, 日本物理学会, 平塚市
  27. STM/STSを用いた鉄カルコゲナイド鉄カルコゲナイド超伝導体FeSexTe1-xの局所障壁高さとトンネルスペクトルの観測, 杉本暁, 坂井優太, 浴野稔一, 日本物理学会年次大会, 2014年03月27日, 通常, 日本語
  28. STM/STS and break junction tunneling spectroscopy of the layered nitro-chloride superconductors, T. EKINO, International workshop on Novel superconductors and super materials, 2013年11月22日, 通常, 英語
  29. STM/STSによる頂点フッ素系多層超伝導体Ba2Ca4Cu5(O,F)xにおけるギャップ分布観測, 杉本暁, 田中勝大, 峰田恭平, 田辺健治, 常磐和靖, 浴野稔一, 日本物理学会秋季大会, 2013年09月26日, 通常, 日本語, 日本物理学会, 徳島市
  30. Tunneling STM/STS and break junction spectroscopy of the layered superconductors b-MNClx (M = H for Zr), T. EKINO, European Conference on Applied Superconductivity, 2013年09月19日, 通常, 英語, GENOVA
  31. Superconducting gap of b-HfNCl and related compounds investigated by scanning tunneling microscopy / spectroscopy and break-junction tunneling, T. EKINO, International Conference on Nanoscience and Nanotechnology, 2013年09月12日, 通常, 英語, PARIS
  32. 鉄カルコゲナイド超伝導体及びその母物質における局所状態密度の変調構造(2), 杉本暁,浴野稔一, 日本物理学会 第68回年次大会, 2013年03月29日, 通常, 日本語
  33. 鉄カルコゲナイド超伝導体及びその母物質における局所状態密度の変調構造, 杉本暁,浴野稔一, 日本物理学会 2012年秋季大会, 2012年09月21日, 通常, 日本語
  34. STM/STS and break junction tunneling spectroscopy of Fe(X(= Se,S), Te), T. Ekino, International Conference on Nanoscience and Technlogy (ICNT2012), Paris-Sorbonne University, 2012 July 21-27., 2012年07月26日, 通常, 英語
  35. Scanning tunneling microscopy/spectroscopy of superconducting β-ZrNClx, 浴野 稔一, International Symposium on Superconductivity (ISS2012), 2012年, 通常, 英語
  36. 鉄系超伝導体Fe(Se,Te)のSTM/STS観測, 浮田龍一、杉本暁、浴野稔一, 日本物理学会2011年秋季大会, 2011年09月23日, 通常, 日本語
  37. ジアミン分子をインターカレートした層状窒化物超伝導体α-(DDA)_xTiNClのSTM観測, 杉本暁、浮田龍一、山中昭司、浴野稔一, 日本物理学会2011年秋季大会, 2011年09月22日, 通常, 日本語
  38. Scanning-tunneling microscopy and break-junction spectroscopy on the superconducting Fe(Se,Te) single crystal, 浴野 稔一, ISS2011, 2011年, 通常, 日本語
  39. Tunneling break junction measurements of the superconducting gap in Y2C3, 浴野 稔一, ISS2011, 2011年, 通常, 日本語
  40. STM/STS Observation on Layered Nitride Superconductor α-(DDA)xTiNCl, A. Sugimoto, S. Yamanaka, T, Ekino, International conference on low temperature physics, 2011年, 通常, 日本語
  41. Scanning tunneling microscopy on iron-chalcogenide superconductor Fe(Se,Te) single crystal, 浴野 稔一, ISS2010, 2010年, 通常, 日本語
  42. Atomic Surface Structures on Multi-Layered Cuprate Superconductor Ba2Ca4Cu5O10(O1-x Fx)2 Observed by STM, 浴野 稔一, ISS2010, 2010年, 通常, 日本語
  43. TUNNELING BREAK-JUNCTION SPECTROSCPOY OF NdFeAs(O0.9F0.1) , 浴野 稔一, 9th International Conference on Materials and Mechanisms of Superconductivity (M2S-IX), 2009年, 通常, 日本語
  44. Scanning Tunneling Microscopy and Spectroscopy (STM/STS) of Layered Nitride Superconductor beta-HfNCl0.7 in comparison with alpha-KxTiNCl , 浴野 稔一, 9th International Conference on Materials and Mechanisms of Superconductivity (M2S-IX), 2009年, 通常, 日本語
  45. Semiconducting gap of Nd1.85Ce0.15CuO4 revealed by break-junction tunnelling spectroscopy, 浴野 稔一, 25th international conference on low temperature physics(LT25), 2008年, 通常, 日本語
  46. 高温超伝導体の仕事関数分布の測定を中心とした話題, 浴野 稔一, 物性研短期研究会「低温走査トンネル顕微鏡の現状と展望」, 2007年10月, 招待, 日本語
  47. Tunneling spectroscopy of novel layered boride and nitride superconductors, 浴野 稔一, 1st hiroshima University and Sungkyungkwan University Workshop on Advanced Materials Research, 2006年11月, 招待, 日本語
  48. MgB2および関連物質のトンネル分光, 浴野 稔一, 低温工学協会 九州・西日本支部若手セミナー, 2005年09月, 招待, 日本語
  49. MgB2のトンネル分光, 浴野 稔一, 日本物理学会2001年度年会, 2001年03月, 通常, 日本語
  50. Break junction でみたBi2Sr2CaCu2O8+dのTc以上でのギャップ構造, 浴野 稔一, 基研研究会「強結合超伝導ーPseudogapを中心としてー」, 1999年03月, 招待, 日本語
  51. Feature of the energy gap in YBa2Cu3O7 from break-junction measurements., 浴野 稔一, International Symposium on High Temperature Superconductivity and Tunneling Phenomena, 1994年09月, 招待, 日本語
  52. Tunneling Spectroscopy of Charge-density-Wave Conductor NbSe3., 浴野 稔一, International Conference on Macroscopic Quantum Phenomena, 1992年09月, 招待, 日本語
  53. 梯子型物質(Sr, Ca)14Cu24O41のトンネル分光(III) 常圧下でのCDWギャップと超伝導ギャップの測定, 浴野稔一, 杉本暁、岩野雅俊、大坪広典、松本凱斗、斉藤毅、Alexander M. Gabovich , 日本物理学会秋の分科会, 2021年09月22日, 通常, 日本語, 日本物理学会, online, BJにより半導体CDW・界面超伝導ギャップとそれらの共存を観測した。両者のエネルギースケールは大きく異なり、明らかな競合の証拠は見出していない。CDWギャップの大きさは ~ 110 -150meV 消失温度~ 90 K である。温度変化の様子は平均場近似と異なり、規格化ギャップ はBCS理論の約 4-5倍(典型CDW物質と同程度)となった。超伝導ギャップの大きさは約 3 ~ 8 meV であり、ジョセフソン電流のIcRN積から求めた値とほぼ一致する。このギャップは、温度Tc = 6 ~ 13 Kで消失(圧力下Tcの範囲)し、その大きさはBCSの2倍(高温超伝導と同様)。 STMによる原子像観測では、結晶表面の乱れ(歪み) が CDWを抑制しキャリア導入して超伝導を誘発していることを示唆している。

社会活動

学術会議等の主催

  1. "先端機能物質の伝導現象と熱現象 (Thermal and Transport Properties of Advanced Materials)", シンポなど組織委員, 2002年08月

その他社会貢献活動(広大・部局主催含)

  1. 高周波電子回路教室, 高周波電子回路教室, 広島市子ども文化科学館, 2020年/12月/12日, 2020年/12月/12日, 講師, セミナー・ワークショップ, 中学生
  2. 第15回物理教育研究会, 理科教育ワークショップVII, 広島県物理教育研究推進会, 2011年/02月/19日, 2011年/02月/19日, 広島県情報プラザ, 運営参加・支援, セミナー・ワークショップ, 教育関係者
  3. 広島市子ども文化科学館, 電子工作教室, 公益財団法人広島市文化財団, 2016年/12月/18日, 2016年/12月/18日, 広島市子ども文化科学館, 講師, その他, 中学生
  4. 第19回物理教育研究会, 理科教材ワークショップ, 広島県物理教育研究推進会, 2015年/02月/21日, 2015年/02月/21日, 広島県情報プラザ, 企画, セミナー・ワークショップ, 教育関係者

学術雑誌論文査読歴

  1. 2021年, Journal of Low Temperature Physics, その他, 査読委員, 1
  2. 2021年, Physical Review B, その他, 査読委員, 1
  3. 2021年, Journal of Physics Communications, その他, 査読委員, 1
  4. 2021年, Physica Review Materials, その他, 査読委員, 1
  5. 2020年, Materials Research Express, その他, 査読委員, 1
  6. 2020年, Superconductor Science and Technology, その他, 査読委員, 2
  7. 2020年, Physical Review B, その他, 査読委員, 2
  8. 2019年, Journal of Physics Condensed Matter, その他, reviewer, 1
  9. 2019年, Journal of Physics Communications, その他, reviewer, 1
  10. 2019年, Physical Review Letters, その他, Reviewer, 1
  11. 2019年, Physical Review B, その他, Reviewer, 1
  12. 2019年, International Journal of the Physical Sciences, その他, Reviewer, 1
  13. 2018年, Journal of Physics: Condensed Matter, その他, 査読, 1
  14. 2018年, Superconductor Science and Technlogy, その他, 査読, 1
  15. 2018年, Physical Review Letters, その他, 査読, 1
  16. 2017年, その他, 査読委員, 2
  17. 2017年, その他, 査読委員, 1
  18. 2017年, その他, 査読委員, 1
  19. 2017年, Scientific Reports, その他, 査読, 1
  20. 2017年, Nanotechnology, その他, 査読, 1
  21. 2016年, その他, 査読委員, 1
  22. 2016年, その他, 査読委員, 2
  23. 2016年, その他, 査読委員, 1
  24. 2015年, Applied Surface Science, その他, Reviewer, 1
  25. 2015年, Materials Chemistry and Physics, その他, Reviewer, 1
  26. 2015年, Solid State Communications, その他, Reviewer, 1
  27. 2015年, Superconductor Science and Technology, Reviewer, 1
  28. 2015年, Physica C, その他, Reviewer, 1
  29. 2015年, Journal of the Physical Society of Japan, その他, Reviewer, 1
  30. 2015年, Physical Review B, その他, Reviewer, 1
  31. 2015年, Journal of Physics Condensed Matter, その他, Reviewer, 1
  32. 2015年, Journal of Physics D: Applied Physics, その他, Reviewer, 1
  33. 2014年, Semiconductor Science and Technology, その他, Reviewer, 1
  34. 2014年, Measurement Science and Technology, その他, Reviewer, 1
  35. 2014年, Physical Review B, その他, Reviewer, 3
  36. 2014年, Superconductor Science and Technology, その他, Reviewer, 1
  37. 2014年, Journal of Physics Condensed Matter, その他, Reviewer, 2
  38. 2014年, Applied Surface Science, その他, Reviewer, 1
  39. 2013年, Solid State Communications, その他, 1
  40. 2013年, SUPERCONDUCTOR SCIENCE AND TECHNOLOGY, その他, Reviewer, 2
  41. 2013年, Current Opinion in Solid State & Materials Science, その他, Reviewer, 1
  42. 2013年, Physical Review Letters, その他, Reviewer, 3
  43. 2013年, Semiconductor Science and Technology, その他, Reviewer, 1