Takumi Hasegawa

Last Updated :2023/03/01

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Associate Professor
E-mail
hasehiroshima-u.ac.jp

Basic Information

Academic Degrees

  • Doctor of Science, Tokyo Institute of Technology
  • Master of Science, Tokyo Institute of Technology

Research Fields

  • Mathematical and physical sciences;Physics;Condensed matter physics II

Research Keywords

  • rattling
  • electron-lattice interaction
  • anharmonicity

Educational Activity

Course in Charge

  1. 2022, Liberal Arts Education Program1, 1Term, Experimental Methods and Laboratory Work in Physics I
  2. 2022, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Physics I
  3. 2022, Liberal Arts Education Program1, 2Term, Experimental Methods and Laboratory Work in Physics II
  4. 2022, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Physics II
  5. 2022, Liberal Arts Education Program1, 1Term, Introductory Seminar for First-Year Students
  6. 2022, Undergraduate Education, First Semester, Fundamental Laboratory Work in Physics
  7. 2022, Undergraduate Education, First Semester, Basic Experimental Methods for Physics
  8. 2022, Undergraduate Education, 1Term, Introduction to Physical Sciences
  9. 2022, Undergraduate Education, 3Term, Laboratory Work in Material Sciences A
  10. 2022, Undergraduate Education, 3Term, Experimental Methods for Materials Sciencs A
  11. 2022, Undergraduate Education, 2Term, Laboratory Work in Material Sciences D
  12. 2022, Undergraduate Education, 2Term, Experimental Methods for Materials Sciencs D
  13. 2022, Undergraduate Education, 4Term, Solid State Physics I
  14. 2022, Undergraduate Education, 2Term, Frontiers of Material Science
  15. 2022, Graduate Education (Master's Program) , 2Term, Fundamentals of Complex Matter
  16. 2022, Graduate Education (Master's Program) , 3Term, Correlated Materials Science

Research Activities

Academic Papers

  1. Inelastic X-ray Scattering Investigation of Proper Ferroelastic Transition in LiNH4C4H4O6 center dot H2O, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 85(1), 2016
  2. Origins of Phase Transitions in Valence Fluctuating YbPd, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 82(8), 2013
  3. Atomic dynamics of low-lying rare-earth guest modes in heavy fermion filled skutterudites ROs4Sb12 (R = light rare-earth), PHYSICAL REVIEW B, 86(19), 2012
  4. Large diamagnetism and low-lying optical phonon modes in Pt-Cd gamma-phase, JOURNAL OF ALLOYS AND COMPOUNDS, 901, 2022
  5. Nearly Room-Temperature Ferromagnetism in a Pressure-Induced Correlated Metallic State of the van der Waals Insulator CrGeTe3, PHYSICAL REVIEW LETTERS, 127(21), 2021
  6. Renormalized Motion of Dysprosium Atoms Filling Boron Cages of DyB6, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 81(11), 2012
  7. Transverse-type Lattice Modulation in LaO0.5F0.5BiS2: Possible Charge Density Wave Formation, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 90(10), 2021
  8. Retreat from Stress: Rattling in a Planar Coordination, ADVANCED MATERIALS, 30(13), 2018
  9. High-pressure Raman study on the superconducting pyrochlore oxide Cd2Re2O7, PHYSICA B-CONDENSED MATTER, 536, 600-603, 2018
  10. Spin-gap formation due to spin-Peierls instability in pi-orbital-ordered NaO2, PHYSICAL REVIEW B, 104(14), 2021
  11. Antiferroelectric distortion with anomalous phonon softening in the excitonic insulator Ta2NiSe5, PHYSICAL REVIEW B, 98(4), 2018
  12. Soft-phonon driven hexagonal-orthorhombic phase transition in BaVS3, PHYSICAL REVIEW B, 99(14), 2019
  13. Successive Continuous Phase Transitions in Spin-Orbit Coupled Metal Cd2Re2O7, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 90(6), 2021
  14. First-Order Metal-Semiconductor Transition Triggered by Rattling Transition in Tetrahedrite Cu12Sb4S13: Cu-Nuclear Magnetic Resonance Studies, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 88(5), 2019
  15. Intercalated Cu+ ion dynamics in the two-dimensional layered compound Cu0.33TiSe2, PHYSICAL REVIEW B, 101(9), 2020
  16. Study of Phonon Dispersion of Iridium Oxide Ca5Ir3O12 with Strong Spin-Orbit Interaction, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 89(5), 2020
  17. First Observation of Superlattice Reflections in the Hidden Order at 105 K of Spin-Orbit Coupled Iridium Oxide Ca5Ir3O12, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 90(6), 2021
  18. Raman Scattering Investigation of Structural Transition in Ca5Ir3O12, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 89(5), 2020
  19. Regular-triangle trimer and charge order preserving the Anderson condition in the pyrochlore structure of CsW2O6, NATURE COMMUNICATIONS, 11(1), 2020
  20. Inelastic X-ray Scattering Study of the Cage-structured Compound PrRh2Zn20, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 90(2), 2021
  21. Lattice instability coupled with valence degrees of freedom in valence fluctuation compound YbPd, PHYSICAL REVIEW B, 102(24), 2020
  22. First-principles calculation of lattice dynamics of skutterudite compounds, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77, 248-250, 2008
  23. Raman Scattering Study of Filled Skutterudite Compounds, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77, 251-253, 2008
  24. Elastic properties of distorted triangular lattice KNiCl3-family compounds, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 75(9), 2006
  25. Raman scattering in KOs2O6, PHYSICAL REVIEW B, 77(6), 2008
  26. Direct observation of low-energy Sm phonon in SmRu4P12, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77(3), 2008
  27. Neutron Diffraction Study of Structural Intermediate Phase IV in TlCoCl3, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77(12), 2008
  28. Off-Center Guest Vibrations and Their Effect on Lattice Thermal Conductivity in n- and p-Type beta-Ba8Ga16Sn30, JOURNAL OF ELECTRONIC MATERIALS, 38(7), 1516-1520, 2009
  29. Lattice dynamical study of alkaline atom vibrations with anharmonic interactions in beta-pyrochlore oxides, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 470, S695-S696, 2010
  30. Raman Scattering Study of Nano-Particle BaTiO3, CHINESE JOURNAL OF PHYSICS, 49(1), 49-55, 2011
  31. Raman scattering of hydrogen storage material LiNH2, CHINESE JOURNAL OF PHYSICS, 49(1), 294-300, 2011
  32. Structural Transition of RhSb3 under High Pressures, CHINESE JOURNAL OF PHYSICS, 49(1), 323-330, 2011
  33. Raman Scattering Study of Hydrogen Storage Material LiNH2, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 81(9), 2012
  34. Raman spectroscopy on ternary transition metal chalcogenide Rb2Ni3S4, Journal of Alloys and Compounds, 364(1-2), 199-207, 20040211
  35. Ultrafast photo-induced metal-insulator transition in 1/4 filled organic crystal (EDO-TTF)2PF6, Journal of Physics: Conference Series, 21, 130-135, 20050301
  36. Gigantic Photoresponse in 1/4-Filled-Band Organic Salt (EDO-TTF)2PF6, Science, 307, 86-89, 20050107
  37. First-Principles Study of Structural Phase Transitions in Hexagonal KNiCl3, Journal of the Korean Physical Society, 46(1), 59-62, 20050101
  38. Elastic properties of distorted triangular lattice KNiCl3-family compounds, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 75(9), 200609
    Link to Paper Search Results by DOI
  39. Raman scattering of Type-I clathrate compounds., Physica B, 383, 134-136, 20060401
  40. Raman scattering study of the guest ion motion in caged crystals., 33-35, 20061201
  41. Dynamical properties of guest ions in the type-I clathrate compounds X8Ga16Ge30 (X=Eu, Sr, Ba)investigated by Raman scattering, Phys. Rev. B, 74, 174303 (1-5), 20061101
  42. Raman scattering investigation of skutterudite compounds, Physica B, 383(1), 128-129, 20061201
  43. Lattice dynamics calculation of infrared active modes of cuprate superconductors, PHYSICA B-CONDENSED MATTER, 383(1), 86-88, 20060815
    Link to Paper Search Results by DOI
  44. Raman scattering investigation of skutterudite compounds, PHYSICA B-CONDENSED MATTER, 383(1), 128-129, 20060815
    Link to Paper Search Results by DOI
  45. Raman scattering of type-I clathrate compounds, PHYSICA B-CONDENSED MATTER, 383(1), 134-136, 20060815
    Link to Paper Search Results by DOI
  46. Dynamical properties of guest ions in the type-I clathrate compounds X8Ga16Ge30 (X=Eu,Sr,Ba) investigated by Raman scattering, PHYSICAL REVIEW B, 74(17), 200611
    Link to Paper Search Results by DOI
  47. Raman scattering study of the skutterudite compounds, Journal of Magnetism and Magnetic Materials, 310(2), 948-950, 20070401
  48. Raman scattering study of type-I clathrate compounds: A8Ga16Ge30 (A = Eu, Sr, Ba), Journal of Magnetism and Magnetic Materials, 310(2), 954-956, 20070401
  49. Raman scattering on La3Pd20X6 (X = Si, Ge), Journal of Magnetism and Magnetic Materials, 310(2), 984-986, 20070401
  50. Raman scattering study of filled skutterudite compounds, Journal of Physics: Conference Series, 92, 012123, 20071201
  51. Raman scattering on KOs2O6, Journal of Physics: Conference Series, 9, 012124, 20071201
  52. Raman scattering of type-I clathrate compounds: A8Ga16Ge30(A = Eu, Sr, Ba) and Sr8Ga16Si30-xGex, Journal of Physics: Conference Series, 92, 012171, 20071201
  53. Low-lying optical modes in filled skutterudites using inelastic x-ray scattering techniques, Journal of Physics: Conference Series, 92, 012171, 20071201
  54. Raman scattering study of the skutterudite compounds, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 310(2), 948-950, 200703
    Link to Paper Search Results by DOI
  55. Raman scattering study of type-I clathrate compounds: A(8)Ga(16)Ge(30) (A = Eu, Sr, Ba), JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 310(2), 954-956, 200703
    Link to Paper Search Results by DOI
  56. Raman scattering on La3Pd20X6 (X = Si, Ge), JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 310(2), 984-986, 200703
    Link to Paper Search Results by DOI
  57. Neutron Diffraction Study of Structural Intermediate Phase IV in TlCoCl3, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77(12), 200812
    Link to Paper Search Results by DOI
  58. Raman Scattering Study of Guest Ion Motion in Cage Compounds, Journal of Physical Society of Japan, 77(SUPPLMENT), 142-147, 20080301
  59. First-priciples calculation of lattice dynamics of skutterudite compounds, 77(SUPPLEMENT), 248-250, 20080301
  60. Raman scattering of type-I clathrate compounds, 77(SUPPLEMENT), 254-256, 20080301
  61. Direct Observation of Low-Energy Sm Phonon in SmRu4P12, 77(3), 033601/4 PAGES, 20080301
  62. Raman scattering of KOs2O6, Physical Review B, 77(6), 064303/ 6 PAGES, 20080315
  63. Anomalous phonon properties in the silicide superconductor CaAlSi and SrAlSi, Physical Review B, 78(18), 184303/10 PAGES, 20081101
  64. Off-center rattling and anisotropic expansion of type-I clathrates studied by Raman scattering, PHYSICAL REVIEW LETTERS, 100(16), 20080425
    Link to Paper Search Results by DOI
  65. Off-Center Guest Vibrations and Their Effect on Lattice Thermal Conductivity in n- and p-Type beta-Ba8Ga16Sn30, JOURNAL OF ELECTRONIC MATERIALS, 38(7), 1516-1520, 200907
    Link to Paper Search Results by DOI
  66. Optical conductivity of rattling phonons in type-I clathrate Ba8Ga16Ge30, PHYSICAL REVIEW B, 79(21), 200906
    Link to Paper Search Results by DOI
  67. Raman scattering investigation of beta-pyrochlore osmium oxides, AOs2O6 (A=K, Rb, and Cs), Journal of Physics: Conference Series, 150, 052067, 20090401
  68. Crystal Field Excitations of Filled Skutterudite PrRu4P12 by Raman Scattering, Journal of Physics: Conference Series, 150, 042147, 20090401
  69. Valence dependence of interatomic interactions in RB6, Journal of Physics: Conference Series, 176, 0120131, 20090701
  70. Raman scattering of rare earth hexaborides, Journal of Physics: Conference Series, 176, 012032, 20090701
  71. 149Sm nuclear resonant inelastic scattering of SmB6, Journal of Physics: Conference Series, 176, 012033, 20090701
  72. Off-center rattling and cage vibration of the carrier-tuned type-I clathrate Ba8Ga16Ge30 studied by Raman scattering, PHYSICAL REVIEW B, 82(13), 20101005
    Link to Paper Search Results by DOI
  73. Lattice dynamical study of alkaline atom vibrations with anharmonic interactions in beta-pyrochlore oxides, PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 470, S695-S696, 201012
    Link to Paper Search Results by DOI
  74. Raman scattering study in iridium pyrochlore oxides, Journal of Physics: Conference Series, 200, 012054, 20100201
  75. Off-center rattling modes and glasslike thermal conductivity in the type-I clathrate Ba8Ga16Sn30, Physical Review B, 81(20), 205207, 20100501
  76. Raman scattering study of nano-particle BaTiO3, Chinese Journal of Physics, 49(1), 49-55, 20110201
  77. Raman scattering of hydrogen storage material LiNH2, Chinese Journal of Physics, 49(1), 294-300, 20110201
  78. Structural transition of RhSb3 under high pressures, Chinese Journal of Physics, 49(1), 323-330, 20110201
  79. Raman spectral analysis of metal-insulator transitions in skutterudite compound PrRu4P12, Chinese Journal of Physics, 49(1), 471-479, 20110201
  80. Low temperature phase of YbPd investigated by Raman scattering, Journal of Physics: Conference Series, 273(1), 012030/1-012030/4, 20110201
  81. Raman Scattering of YB6, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 80, 201107
  82. Raman scattering investigation on YbPd, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 80, 201107
  83. Raman scattering study of lattice dynamics in caged compounds, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 80, 201107
  84. The anharmonic vibration of Li in lithium amide, APPLIED PHYSICS LETTERS, 100(15), 20120409
    Link to Paper Search Results by DOI
  85. Tetrahedral Magnetic Order and the Metal-Insulator Transition in the Pyrochlore Lattice of Cd2Os2O7, PHYSICAL REVIEW LETTERS, 108(24), 20120613
    Link to Paper Search Results by DOI
  86. Raman Scattering Study of Hydrogen Storage Material LiNH2, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 81(9), 201209
    Link to Paper Search Results by DOI
  87. Renormalized Motion of Dysprosium Atoms Filling Boron Cages of DyB6, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 81(11), 201211
    Link to Paper Search Results by DOI
  88. Atomic dynamics of low-lying rare-earth guest modes in heavy fermion filled skutterudites ROs4Sb12 (R = light rare-earth), PHYSICAL REVIEW B, 86(19), 20121112
    Link to Paper Search Results by DOI
  89. Origins of Phase Transitions in Valence Fluctuating YbPd, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 82(8), 201308
    Link to Paper Search Results by DOI
  90. First-principles calculations of lattice vibrations on LaT2Zn20 (T = Ru and Ir), Journal of Physics: Conference Series, 391, 012016, 20130101
  91. Raman scattering spectra of LaRu2Al10 and CeRu2Al10, Journal of Physics: Conference Series, 391, 012050, 20130101
  92. Crystal Electric Field Study in Pr(Os1-xRux)4Sb12 by Raman Scattering, JPS Conf. Proc., 3, 015040/1-015040/6, 20140616
  93. Measurement of Crystal Field Excitations in NdT2Al10 (T=Ru and Os) by Raman Scattering, JPS Conf. Proc., 3, 011070/1-011070/6, 20140616
  94. Atomic Dynamics and Structural Transitions in Caged Compounds RRu2Zn20 (R=La and Pr), JPS Conf. Proc., 3, 011068/1-011068/5, 20140616
  95. Inelastic X-ray Scattering of Valence Fluctuating YbPd, JPS Conf. Proc., 3, 011037/1-011037/5, 20140616
  96. Interplay between low-energy optical phonon modes and structural transition in PrT2Zn20 (T=Ru and Ir), Journal of Physics: Conference Series, 592, 012024/1-012024/6, 20150325
  97. Valence-lattice interaction on YbPd, Journal of Physics: Conference Series, 592, 012061/1-012061/6, 20150325
  98. Inelastic X-ray Scattering Investigation of Proper Ferroelastic Transition in LiNH4C4H4O6 center dot H2O, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 85(1), 20160115
    Link to Paper Search Results by DOI
  99. Low-energy optical phonon modes in the caged compound LaRu2Zn20, PHYSICAL REVIEW B, 93(6), 20160209
    Link to Paper Search Results by DOI
  100. Guest Ion Motion in Cage Structure Crystals Investigated by Raman Scattering, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77, 142-147, 2008
  101. Raman Scattering of Type-I Clathrate Compounds, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77, 254-256, 2008
  102. 15aXD-6 Raman scattering measurement of CoS_2, MnSi, and Sc_3In as itinerant electron magnet, Meeting abstracts of the Physical Society of Japan, 59(2), 20040825
  103. 27pXQ-4Raman scattering on (EDO-TTF)_2PF_6., Meeting abstracts of the Physical Society of Japan, 60(1), 20050304
  104. 22pWF-6 Raman scattering study of off-center rattling in type-I Ba_8Ga_<16>Sn_<30>, Meeting abstracts of the Physical Society of Japan, 63(2), 20080825
  105. 23pTH-8 Raman scattering of clathrate compounds Sr_8Ga_<16>Si<30-x>Ge_x II, Meeting abstracts of the Physical Society of Japan, 62(2), 20070821
  106. 28aPS-70 Inelastic X-ray scattering study of phonon dispersion in RT_2Zn_<20> (R=La, Pr, T=Ru, Ir), Meeting abstracts of the Physical Society of Japan, 69(1), 20140305
  107. Effect of rattling motion without cage structure on lattice thermal conductivity in LaOBiS2-xSex, APPLIED PHYSICS LETTERS, 112(2), 20180108
    Link to Paper Search Results by DOI
  108. Retreat from Stress: Rattling in a Planar Coordination, ADVANCED MATERIALS, 30(13), 20180327
    Link to Paper Search Results by DOI
  109. High-pressure Raman study on the superconducting pyrochlore oxide Cd2Re2O7, PHYSICA B-CONDENSED MATTER, 536, 600-603, 20180501
    Link to Paper Search Results by DOI
  110. Antiferroelectric distortion with anomalous phonon softening in the excitonic insulator Ta2NiSe5, PHYSICAL REVIEW B, 98(4), 20180730
    Link to Paper Search Results by DOI
  111. Soft-phonon driven hexagonal-orthorhombic phase transition in BaVS3, PHYSICAL REVIEW B, 99(14), 20190423
    Link to Paper Search Results by DOI
  112. First-Order Metal-Semiconductor Transition Triggered by Rattling Transition in Tetrahedrite Cu12Sb4S13: Cu-Nuclear Magnetic Resonance Studies, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 88(5), 20190515
    Link to Paper Search Results by DOI
  113. Intercalated Cu+ ion dynamics in the two-dimensional layered compound Cu0.33TiSe2, PHYSICAL REVIEW B, 101(9), 20200331
    Link to Paper Search Results by DOI
  114. Study of Phonon Dispersion of Iridium Oxide Ca5Ir3O12 with Strong Spin-Orbit Interaction, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 89(5), 20200515
    Link to Paper Search Results by DOI
  115. Raman Scattering Investigation of Structural Transition in Ca5Ir3O12, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 89(5), 20200515
    Link to Paper Search Results by DOI
  116. Coexistence of odd-parity and even-parity order parameters in the multipole order phase of the spin-orbit coupled metal Cd2Re2O7, PHYSICAL REVIEW B, 101(20), 20200519
    Link to Paper Search Results by DOI
  117. Regular-triangle trimer and charge order preserving the Anderson condition in the pyrochlore structure of CsW2O6, NATURE COMMUNICATIONS, 11(1), 20200619
    Link to Paper Search Results by DOI
  118. Anomalous changes of electric quadrupole order at low temperatures in the spin-orbit coupled metal Cd2Re2O7, PHYSICAL REVIEW B, 102(15), 20201021
    Link to Paper Search Results by DOI
  119. Lattice instability coupled with valence degrees of freedom in valence fluctuation compound YbPd, PHYSICAL REVIEW B, 102(24), 20201230
    Link to Paper Search Results by DOI
  120. Inelastic X-ray Scattering Study of the Cage-structured Compound PrRh2Zn20, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 90(2), 20210215
    Link to Paper Search Results by DOI
  121. First Observation of Superlattice Reflections in the Hidden Order at 105 K of Spin-Orbit Coupled Iridium Oxide Ca5Ir3O12, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 90(6), 20210615
    Link to Paper Search Results by DOI
  122. Successive Continuous Phase Transitions in Spin-Orbit Coupled Metal Cd2Re2O7, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 90(6), 20210615
    Link to Paper Search Results by DOI
  123. Zn-Substitution Effect on Metal-Semiconductor Transition in Tetrahedrite Cu12Sb4S13, JPS Conference Proceedings, 29, 013008, 20190925
  124. Precursor of Metal-Semiconductor Transition in Tetrahedrite Probed by Cu-NMR, JPS Conference Proceedings, 30, 011075, 20190917

Invited Lecture, Oral Presentation, Poster Presentation

  1. Bond strength in ammonia borane and its related materials, Takumi Hasegawa, Tessui Nakagawa, Troy A. Semelsberger, Benjamin L. Davis, Rico E. Del Sesto, Anthony K. Burrell, Ogita Norio, and Masayuki Udagawa, The 10th Japan-Korea Conference on Ferroelectrics, 2014/08/17, Without Invitation, English, Hiroshima, Japan
    Related URL
  2. Raman scattering investigation on ammonia borane and amidoborane compounds, Takumi Hasegawa, Tessui Nakagawa, Troy A. Semelsberger, Benjamin L. Davis, Rico E. Del Sesto, Anthony K. Burrell, Ogita Norio, and Masayuki Udagawa, The International Meeting on Advanced Material Science for Hydrogen, 2014/08/25, Without Invitation, English, Okinawa, Japan
  3. First-principles calculation of phonon dispersion on Cu12Sb4S13, Takumi Hasegawa, K. Suekuni, H. I. Tanaka, T. Takabatake, N. Ogita, and M. Udagawa, 2015/09/16, Without Invitation, Japanese
  4. First-principles calculation of anharmonicity on LaRu4Sb12 and LaOs4Sb12, T. Hasegawa, N. Ogita, and M. Udagawa, 2015/03/21, Without Invitation, Japanese
  5. Incident-wavelength dependence of Raman spectra on LaB6, T. Hasegawa, N. Ogita, and M. Udagawa, 2014/09/07, Without Invitation, Japanese
  6. Valence-phonon interaction and structural transitions in YbPd, T. Hasegawa, N. Ogita, A. Mitsuda, M. Sugishima, H. Wada, S. Tsutsui, A. Q. R. Baron, M. Udagawa, 2014/03/27, Without Invitation, Japanese
  7. First principles calculation of lattice dyncamics on LaT2Zn20 (T=Ru,Ir), T. Hasegawa, N. Ogita, M. Udagawa, 2013/09/25, Without Invitation, Japanese
  8. Raman scattering on MnP, T. Hasegawa, N. Ogita, M. Udagawa, S. Yano, Y. Kousaka, J. Akimitsu, 2013/03/26, Without Invitation, Japanese
  9. Measurement of Crystal Field Excitations in NdT2Al10 (T = Ru and Os) by Raman Scattering, T. Hasegawa, K. Nagano, N. Ogita, M. Udagawa, H. Tanida, D. Tanaka, M.Sera, T. Nishioka, M. Matsumura, The International Conference on Strongly Correlated Electron Systems, SCES2013, 2013/08/05, Without Invitation, English, Tokyo, Japan
    Related URL
  10. Investigation of low-temperature structure and anharmonic interactions on Tetrahedrites Cu12X4S13 (X = As, Sb) by first-principles calculation, Takumi Hasegawa, Norio Ogita, Masayuki Udagawa, The 2016 Autumn Meeting of JPS, 2016/09/13, Without Invitation, Japanese, The Physical Society of Japan, Kanazawa University
  11. Analysis of anharmonicity on tetrahedrites Cu12X4S13 (X=Sb and As), Takumi Haseagwa, ECMP2018, 2018/03/05, With Invitation, English, Akio Kimura, Higashi-Hiroshima, Hiroshima, Japan
    Related URL
  12. Review of the results on order parameters of Cd2Re2O7, Takumi Hasegawa, 2018/08/08, With Invitation, Japanese
  13. Raman scattering investigation on geometrically frustrated iridate Ca5Ir3O12, T. Hasegawa, N. Ogita, W. Yoshida, K. Nakamura, and K. Matsuhira, Emergence Condensed-Matter Physics 2019, 2019/03/19, Without Invitation, English, Higashi-Hiroshima, Hiroshima, Japan
  14. Raman scattering investigation on geometrically frustrated iridate Ca5Ir3O12, T. Hasegawa, W. Yoshida, K. Nakamura, N. Ogita, K. Matsuhira, Frontiers of Correlated Electron Sciences 2019, 2019/05/29, Without Invitation, English, Tokyo University, Tokyo, Japan

Awards

  1. 2105/01, JPSJ Papers of Editors' Choice, The Physical Society of Japan, First Observation of Superlattice Reflections in the Hidden Order at 105 K of Spin-Orbit Coupled Iridium Oxide Ca5Ir3O12

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI, Study on the mechanism of metal-insulator transition in the pyrochlore iridates, 2011, 2013
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  2. KAKENHI, Investigation of Alkaline metal vibration effect on the electric states in β-pyrochlore oxides, 2009, 2010
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