ISAO ISHII

Last Updated :2021/01/05

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Associate Professor
Web Site
E-mail
ishhiroshima-u.ac.jp
Other Contact Details
Kagamiyama 1-3-1, Higashi-Hiroshima, Hiroshima, Japan, Japan
TEL : (+81)82-424-7042 FAX : (+81)82-424-7042
Self-introduction
Experimental studies on the strongly correlated electron systems by means of ultrasonic spectroscopy. Our research focuses on novel physical properties originating from magnetism, multipoles, and a large-amplitude atomic oscillation under multiple extreme conditions.

Basic Information

Educational Backgrounds

  • Hiroshima University, Japan, 2001/04, 2004/03
  • Hiroshima University, Japan, 1999/04, 2001/03
  • Hiroshima University, Japan, 1995/04, 1999/03

Academic Degrees

  • Doctor of Science, Hiroshima University
  • Master of Science, Hiroshima University

Educational Activity

  • 【Bachelor Degree Program】School of Science : Physics
  • 【Master's Program】Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Quantum Matter Program
  • 【Doctoral Program】Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Quantum Matter Program

In Charge of Primary Major Programs

  • Physics

Research Fields

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

Research Keywords

  • Low temperature physics, Multi-extreme conditions, Strongly correlated electron systems, Ultrasonic spectroscopy

Affiliated Academic Societies

Educational Activity

Course in Charge

  1. 2020, Liberal Arts Education Program1, 1Term, Exercise in Information Literacy
  2. 2020, Undergraduate Education, Second Semester, Special Study for Graduation B
  3. 2020, Undergraduate Education, 1Term, Experiments in General Physics A
  4. 2020, Graduate Education (Master's Program) , First Semester, Seminar on Sciences of Matter
  5. 2020, Graduate Education (Master's Program) , Second Semester, Seminar on Sciences of Matter
  6. 2020, Graduate Education (Master's Program) , 3Term, Exercises in Basic Sciences of Matter B
  7. 2020, Graduate Education (Master's Program) , First Semester, Seminar on Basic Sciences of Matter A
  8. 2020, Graduate Education (Master's Program) , Second Semester, Seminar on Basic Sciences of Matter B
  9. 2020, Graduate Education (Master's Program) , Academic Year, Academic Presentation in Basic Sciences of Matter
  10. 2020, Graduate Education (Master's Program) , 1Term, Exercises in Basic Sciences of Matter A
  11. 2020, Graduate Education (Master's Program) , 2Term, Exercises in Basic Sciences of Matter A
  12. 2020, Graduate Education (Master's Program) , 4Term, Exercises in Basic Sciences of Matter B
  13. 2020, Graduate Education (Master's Program) , Academic Year, Advanced Study in Quantum Matter
  14. 2020, Graduate Education (Doctoral Program) , Academic Year, Advanced Study in Quantum Matter

Award of Education

  1. 2019/11/22, Hiroshima university

Research Activities

Academic Papers

  1. ★, Magnetic transition due to the inter-singlet spin-exchange interaction and elastic softening by the interplay of electric quadrupoles in the distorted kagome lattice antiferromagnet Tb3Ru4Al12, PHYSICAL REVIEW B, 101(16), 20200415
  2. The Crystal Electric Field Effect in the Distorted Kagome Lattice Ferromagnet Nd3Ru4Al12, JPS Conf. Proc., 30, 011161, 20200319
  3. Ultrasonic Dispersion in the Hexagonal Ferromagnet Nd3Ru4Al12, JPS Conf. Proc., 30, 011091, 20200319
  4. Low frequency dependent elastic modulus in UCo1-xOsxAl, JPS Conf. Proc., 30, 011173, 20200319
  5. Crystal electric field response in elastic modulus without rattling effect in the cage compound NdCo2Zn20, JPS Conf. Proc., 30, 011162, 20200319
  6. Quadrupolar response from the crystal electric field level scheme consisting of only Kramers doublets in DyNiAl, JPS Conf. Proc., 30, 011165, 20200319
  7. Crystal-field effects in Er3Ru4Al12 with a distorted kagome lattice, PHYSICAL REVIEW B, 101, 094415, 20200313
  8. Acoustic signatures of the phase transitions in the antiferromagnet U2Rh2Sn, PHYSICAL REVIEW B, 101(1), 014408, 20200108
  9. ★, Anisotropic phase diagram of ferroquadrupolar ordering in the trigonal chiral compound DyNi3Ga9, PHYSICAL REVIEW B, 99(7), 20190226
  10. Successive phase transitions in single-crystalline (C2H5NH3)(2)CuCl4 and potential of multiferroicity, SOLID STATE COMMUNICATIONS, 290, 49-54, 201903
  11. Magnetization beyond the Ising limit of Ho2Ti2O7, PHYSICAL REVIEW B, 99(8), 20190220
  12. Magnetic phase diagram and crystal-field effects in the kagome-lattice antiferromagnet U3Ru4Al12, PHYSICAL REVIEW B, 99(5), 20190215
  13. ★, Magnetic-field-induced quadrupolar ordering and the crystal electric field effect in the distorted kagome lattice antiferromagnet Dy3Ru4Al12, PHYSICAL REVIEW B, 97(23), 20180618
  14. Crystal-field effects in the kagome antiferromagnet Ho3Ru4Al12, PHYSICAL REVIEW B, 97(18), 20180508
  15. ★, Ferroquadrupolar Ordering due to the Quasi-degenerate Quartet in the Trigonal Chiral Structure of DyNi3Ga9, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 87, 013602, 20171218
  16. Elastic moduli of the distorted Kagome-lattice ferromagnet Nd3Ru4Al12, PHYSICA B-CONDENSED MATTER, 536, 18-20, 20180501
  17. Elastic anomalies under magnetic fields in the heavy-fermion ferromagnet YbPtGe, AIP ADVANCES, 8(10), 201810
  18. Elastic softening due to the quadrupole interaction and anomalous magnetic phase diagram under the magnetic field in HoRu2Al10, PHYSICAL REVIEW B, 96(15), 20171023
  19. Ultrasonic Study on the Hexagonal Antiferromagnet Dy3Ru4Al12, Journal of Physics: Conference Series, 807, 012002, 2017
  20. Anomalous Antiferromagnetic Phase Diagram in HoRu2Al10, Journal of Physics: Conference Series, 807, 012010
  21. Elastic Softening in the Metallic Antiferromagnet YbCuGe, Journal of Physics: Conference Series, 807, 012012
  22. Field induced phase transition with quadrupole fluctuation in HoFe2Al10 with orthorhombic symmetry, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 86, 044601, 20170323
  23. ★, Exotic Ground State and Elastic Softening under Pulsed Magnetic Fields in PrTr2Zn20 (Tr = Rh, Ir), JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 85(4), 043601, 20160415
  24. Elastic Softening in HoFe2Al10 due to the Quadrupole Interaction under an Orthorhombic Crystal Electric Field, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 85(7), 074604, 20160715
  25. The Crystal Electric Field Effect on 4f-Hole and Magnetic Phase Diagram in Heavy-Fermion Compound YbPtGe Determined from Ultrasonic Measurements, J. Phys. Soc. Jpn, 84, 124602, 20151215
  26. Elastic softening in the orthorhombic compound YbPdGe, Physics Procedia, 75, 166-170
  27. Elastic softening in the tetrahedrite Cu12Sb4S13, Physics Procedia, 75, 443-446
  28. Elastic softening in HoFe2Al10, Physics Procedia, 75, 187-191
  29. Elastic softening and phase transition characteristics in YbPtGe, Physics Procedia, 75, 516-521
  30. Elastic anomalies of YbIrGe in magnetic fields, Journal of Physics: Conference Series, 592, 012018
  31. ★, Anomalous Elastic Softening due to the Crystal Electric Field Effect and Successive Phase Transitions in the Yb-Based Heavy-Fermion Antiferromagnet YbIrGe, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83(4), 043601, 201404
  32. Elastic Softening of Transverse Modulus in YbIrGe, J. Phys. Soc. Conf. Proc., 3, 011057, 20140616
  33. Successive phase transitions in TbFe2Al10, J. Phys. Soc. Conf. Proc., 3, 011038, 20140616
  34. ★, Antiferroquadrupolar ordering and magnetic-field-induced phase transition in the cage compound PrRh2Zn20, PHYSICAL REVIEW B, 87(20), 205106, 20130507
  35. ★, Lattice instability and elastic dispersion due to the rattling motion in the type-I clathrate Ba8Ga16Sn30, PHYSICAL REVIEW B, 85(8), 085101, 20120207
  36. Successive Phase Transitions and Anisotropic Magnetic Field-Temperature Phase Diagram in NdRu2Al10, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 81(6), 064602, 201206
  37. Magnetic Field-Temperature Phase Diagram of the Ferro-quadrupolar State and Crystal Electric Field Effect in UCu2Sn, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 81(2), 024602, 201202
  38. Elastic anomalies at successive phase transitions in NdRu2Al10, J. Phys.: Conf. Ser., 391, 012069
  39. The anharmonic vibration of Li in lithium amide, APPLIED PHYSICS LETTERS, 100(15), 151911, APR 9 2012
  40. Antiferrodistortive phase transition in pseudorhombohedral (Pb0.94Sr0.06)( Zr0.550Ti0.450)O-3: A combined synchrotron x-ray and neutron powder diffraction study, PHYSICAL REVIEW B, 86(17), 174117, NOV 30 2012
  41. ★, Antiferro-Quadrupolar Ordering at the Lowest Temperature and Anisotropic Magnetic Field-Temperature Phase Diagram in the Cage Compound PrIr2Zn20, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 80(9), 093601, 201109
  42. Elastic properties of cage compound CeOs2Al10, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 80, SA045
  43. Emergence of elastic softening in Sr8Ga16Si30-xGex with increasing Ge concentration, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 80, SA084
  44. Elastic anomalies of TbB4 in pulsed high magnetic fields, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83, SA038
  45. Elastic modulus of cage compound PrRu2Zn20, Journal of Physics: Conference Series, 273, 012136
  46. Elastic Hardening at Novel Phase Transition in Cage Compound CeRu2Al10, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 79, 05360, 2010
  47. Superconductivity and Structural Phase Transitions in Caged Compounds RT2Zn20 (R=La,Pr, T=Ru,Ir), JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 79, 033704
  48. Low Temperature Magnetic Properties of Ce3Pd20Si6, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 79, 074712
  49. Quadrupole Order in Clathrate Compound Pr3Pd20Si6, Journal of Physics: Conference Series, 200, 012121
  50. Magnetic Properties of Ce3Pd20Si6 at Very Low Temperatures, Journal of Physics: Conference Series, 200, 012118
  51. ★, Ultrasonic Dispersion in All Elastic Moduli and Softening at Low Temperatures in Filled Skutterudite LaFe4Sb12, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 78, 084601, 2009
  52. Ultrasonic Dispersion in the Filled Skutterudite CeFe4Sb12, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 150, 042071
  53. Large Softening of Longitudinal Elastic Modulus in TbB4, Journal of Physics: Conference Series, 150, 042194
  54. Multipole effects in non-Kramers doublet system PrMg3, Physica B, 404, 3187
  55. Temperature dependence of elastic modulus on PrFe4Sb12 single crystal, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77, SA303
  56. Elastic modulus of LaFe4Sb12, Physica B, 403, 887
  57. Elastic Properties of Eu8Ga16Ge30, Journal of Magnetism and Magnetic Materials, 310, 957
  58. Elastic Properties of Sr8Ga16Ge30, Physica B, 383, 130
  59. Elastic softening due to crystal electric field effect in TmB12, AIP Conference Proceedings, 850, 1289
  60. Elastic, thermal, magnetic and transport properties of Kondo compounds CeRhIn and CeRhSn, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 75, 024709
  61. Dynamical properties of guest ions in the type-I clathrate compounds X8Ga16Ge30 (X = Eu,Sr,Ba) investigated by Raman scattering, PHYSICAL REVIEW B, 74, 174303
  62. Elastic anomaly around a ferromagnetic transition in Y1-xCaxTiO3 (x = 0 – 0.2), Physica B, 383, 43
  63. Elastic softening mode change in Y1-xCaxTiO3 by Ca-doping, Physica B, 378-380, 332
  64. Elastic properties of clathrate compound Ba8Ga16Sn30, Physica B, 359-361, 1210
  65. Elastic properties of valence fluctuating CeRhIn, Physica B, 359-361, 136
  66. Anomalous temperature dependence of elastic moduli of CeRhSn, Journal of Magnetism and Magnetic Materials, 272-276, e35
  67. ★, Spontaneous strain due to ferroquadrupolar ordering in UCu2Sn, PHYSICAL REVIEW B, 68, 144413, 2003
  68. Thermal expansion of UCu2Sn in the basal plane, Physica B, 329-333, 553
  69. Elastic anomaly of UCu2Sn in the magnetic fields, Journal of Magnetism and Magnetic Materials, 226-230, 983
  70. Quadrupolar ordering of 5f electrons in UCu2Sn, PHYSICAL REVIEW B, 62, 49, 2000
  71. Jahn-Teller instability in a ternary uranium compound, Physica B, 284-288, 1301
  72. Elastic Quantum Oscillation of LuB12, Physica B, 281-282, 756

Invited Lecture, Oral Presentation, Poster Presentation

  1. The Crystal Electric Field Effect in the Distorted Kagome Lattice Ferromagnet Nd3Ru4Al12, I. Ishii, T. Mizuno, S. Kumano, T. Umeno, D. Suzuki, A. V. Andreev, D. I. Gorbunov, M. S. Henriques, and T. Suzuki, International Conference on Strongly Correlated Electron Systems, 2019/09/23, Without Invitation, English, Okayama, Japan
  2. Elastic anomalies under magnetic fields in the heavy-fermion ferromagnet YbPtGe, I. Ishii, X. Xi, Y. Noguchi, T. Mizuno, S. Kumano, K. Araki, K. Katoh, and T. Suzuki, International Conference on Magnetism, 2018/07, Without Invitation, English, San Francisco, USA
  3. Ultrasonic Study on the Hexagonal Antiferromagnet Dy3Ru4Al12, I. Ishii, K. Takezawa, H. Goto, S. Kamikawa, A. V. Andreev, D. I. Gorbunov, M. S. Henriques, and T. Suzuki, International Conference on Strongly Correlated Electron Systems (SCES2016), 2016/05, Without Invitation, English, Hangzhou, China
  4. Elastic softening in the orthorhombic compound YbPdGe, I. Ishii, Y. Noguchi, H. Goto, X. Xi, S. Kamikawa, K. Araki, K. Katoh, and T. Suzuki, International Conference on Magnetism 2015, 2015/07, Without Invitation, English, Barcelona, Spain
  5. Elastic Softening of Transverse Modulus in YbIrGe, I. Ishii, Y. Noguchi, S. Kamikawa, T.K. Fujita, K. Katoh, and T. Suzuki, The International Conference on Strongly Correlated Electron Systems SCES2013, 2013/08, Without Invitation, English, Tokyo, Japan
  6. Elastic properties of cage compound CeOs2Al10, I. Ishii, Y. Suetomi, H. Muneshige, T.K. Fujita, Y. Muro, J. Kajino, T. Takabatake, and T. Suzuki, International Conference on Heavy Electrons 2010, 2010/09, Without Invitation, English, Tokyo, Japan
  7. Elastic modulus of cage compound PrRu2Zn20, I. Ishii, Y. Suetomi, T.K. Fujita, T. Onimaru, K.T. Matsumoto, Y.F. Inoue, T. Takabatake, and T. Suzuki, The International Conference on Strongly Correlated Electron Systems SCES 2010, 2010/06, Without Invitation, English, Santa Fe, USA
  8. Ultrasonic Dispersion in the Filled Skutterudite CeFe4Sb12, I. Ishii, T. Suzuki, T. Fujita, I. Mori, H. Sugawara, M. Yoshizawa, Y. Nemoto, and T. Goto, 25th International Conference on Low Temperature Physics, 2008/08, Without Invitation, English, Amsterdam, Netherlands
  9. Temperature dependence of elastic modulus on PrFe4Sb12 single crystal, I. Ishii, T. Fujita, I. Mori, H. Sugawara, M. Yoshizawa, and T. Suzuki, International Conference on "New Quantum Phenomena in Skutterudite and Related Systems", 2007/09, Without Invitation, English, Kobe, Japan
  10. Elastic modulus of LaFe4Sb12, I. Ishii, H. Higaki, S. Morita, I. Mori, H. Sugawara, M. Yoshizawa, and T. Suzuki, The International Conference on Strongly Correlated Electron Systems SCES '07, 2007/05, Without Invitation, English, Houston, USA
  11. Elastic properties of Eu8Ga16Ge30, I. Ishii, H. Higaki, S. Morita, M.A. Avila, T. Takabatake, and T. Suzuki, International Conference on Magnetism 2006, 2006/08, Without Invitation, English, Kyoto, Japan
  12. Rattling Motion in The Clathrate Ba8Ga16Sn30, I. Ishii, H. Higaki, S. Morita, T. Sakata, H. Dexuan, T. Takabatake, and T. Suzuki, 24th International Conference on Low Temperature Physics, 2005/08, Without Invitation, English, Orlando, USA
  13. Elastic properties of clathrate compound Ba8Ga16Sn30, I. Ishii, H. Higaki, T. Sakata, H. Dexuan, T. Takabatake, and T. Suzuki, The International Conference on Strongly Correlated Electron Systems SCES '04, 2004/07, Without Invitation, English, Karlsruhe, Germany
  14. Thermal expansion of UCu2Sn in the basal plane, I. Ishii, H. Higaki, K. Katoh, T. Takabatake, H. Goshima, T. Fujita, and T. Suzuki, 23rd International Conference on Low Temperature Physics, 2002/08, Without Invitation, English, Hiroshima, Japan

Awards

  1. 2020/01/08, Physical Review B Editors' Suggestion, American Physical Society
  2. 2010/02, JPSJ Papers of Editors' Choice, Journal of the Physical Society of Japan, Superconductivity and Structural Phase Transitions in Caged Compounds RT2Zn20 (R=La,Pr, T=Ru,Ir)

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI, 2019, 2021
  2. KAKENHI, 2018, 2020
  3. KAKENHI, 2014, 2015
  4. KAKENHI, Strongly correlated quantum phase associated with charge fluctuation, 2006, 2010

Social Activities

History as Peer Reviews of Academic Papers

  1. 2020, Physical Review B, Others, Reviewer, 1
  2. 2019, JPS Conf. Proc., Others, Reviewer, 1
  3. 2016, J. Phys.: Conf. Ser., Others, Reviewer, 1
  4. 2013, JPS Conf. Proc., Others, Reviewer, 1