Hiroshi Shimahara

Last Updated :2024/04/03

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

Basic Information

Academic Degrees

  • Doctor of Science, University of Tsukuba
  • Master of Science, University of Tsukuba

Research Fields

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

Research Keywords

  • Superconductivity
  • Solid State Physics
  • Theoretical Physics

Educational Activity

Course in Charge

  1. 2024, Undergraduate Education, First Semester, Statistical Mechanics I
  2. 2024, Undergraduate Education, Second Semester, Statistical Mechanics II
  3. 2024, Undergraduate Education, 4Term, Advanced Physics
  4. 2024, Undergraduate Education, First Semester, Special Study for Graduation A
  5. 2024, Undergraduate Education, Second Semester, Special Study for Graduation B
  6. 2024, Graduate Education (Master's Program) , First Semester, Seminar on Basic Sciences of Matter A
  7. 2024, Graduate Education (Master's Program) , Second Semester, Seminar on Basic Sciences of Matter B
  8. 2024, Graduate Education (Master's Program) , Academic Year, Academic Presentation in Basic Sciences of Matter
  9. 2024, Graduate Education (Master's Program) , 1Term, Exercises in Basic Sciences of Matter A
  10. 2024, Graduate Education (Master's Program) , 2Term, Exercises in Basic Sciences of Matter A
  11. 2024, Graduate Education (Master's Program) , 3Term, Exercises in Basic Sciences of Matter B
  12. 2024, Graduate Education (Master's Program) , 4Term, Exercises in Basic Sciences of Matter B
  13. 2024, Graduate Education (Master's Program) , 1Term, Introduction to Physics and Material Science
  14. 2024, Graduate Education (Master's Program) , Academic Year, Advanced Study in Quantum Matter
  15. 2024, Graduate Education (Doctoral Program) , Academic Year, Advanced Study in Quantum Matter

Award of Education

  1. 2019/11/02, Hiroshima University

Research Activities

Academic Papers

  1. Types of Fulde-Ferrell-Larkin-Ovchinnikov states induced by anisotropy effects, PHYSICAL REVIEW B, 79(6), 200902
  2. Transition from the vortex state to the Fulde-Ferrell-Larkin-Ovchinnikov state in quasi-two-dimensional superconductors, PHYSICAL REVIEW B, 80(21), 200912
  3. Local Interactions and Van Hove Singularities in High-T_c Superconductor, Jpn. J. Appl. Phys., 26(10), L1674-L1677, 19871001
  4. ★, Superconductivity and Spin Density Wave in Two Dimensional Hubbard Model, J. Phys. Soc. Jpn., 57(3), 1044-1055, 19880301
  5. ★, Long-Range Spin-Fluctuations and Superconductivity in Quasi-One-Dimensional Organic Compounds, J. Phys. Soc. Jpn., 58(5), 1735-1747, 19890501
  6. Magnetic Properties of the Strong Coupling Hubbard Model, J. Phys. Soc. Jpn., 58(3), 801-804, 19890301
  7. Magnetic Properties and Superconductivity of the Strong Coupling Hubbard Model, J. Phys. Soc. Jpn., 58(11), 4168-4183, 19891101
  8. ★, Green’s Function Theory of the Two-Dimensional Heisenberg Model - Spin Wave in Short Range Order -, J. Phys. Soc. Jpn., 60(7), 2394-2405, 19940701
  9. Theory of Spin waves in Short Range Order on the basis of the Two Dimensional t-J Model, Physica C, 185-189, 1517-1518, 19910801
  10. Fragility of the Antiferromagnetic Long-Range-Order and Spin Correlation in the Two-dimensional t-J Model, J. Phys. Soc. Jpn., 61(3), 989-997, 19920301
  11. Antiferromagnetic Long-Range-Order and Spin Waves in the Spin-Fermion Model on the CuO_2 Lattice, J. Phys. Soc. Jpn., 61(10), 3708-3720, 19921001
  12. Antiferromagnetic Transition Temperature and Spin Correlations in Quasi-Two-Dimensional Spin-Fermion Model, J. Phys. Soc. Jpn., 62(4), 1324-1335, 19920401
  13. Effect of the Landau parameter F_2^a on the magnetic phase diagram of superfluid 3He, Physica B, 194, 801-804, 19940401
  14. Fermion-Magnon Bound State in a Spin-Fermion Model, J. Phys. Soc. Jpn., 63, 1059-1070, 19940401
  15. Magnon Exchange Mechanism of Superconductivity in a Generalized Kondo Lattice Model, J. Phys. Soc. Jpn., 63, 1861-1870, 19940401
  16. Order Parameter Mixing Effect in the Fulde-Ferrell State, J. Phys. Soc. Jpn., 63, 2499-250, 19940401
  17. ★, Fulde-Ferrell state in a quasi-two-dimensional superconductors, Phys. Rev. B, 50, 12760-12765, 19940401
  18. A Nonuniform State in a d-Wave Superconductor under Magnetic Field, J. Phys. Soc. Jpn., 64, 371-374, 19950401
  19. Spiral spin states in a generalized Kondo lattice model with classical spins, Phys. Rev. B, 51, 3027-3030, 19950401
  20. Nonplanar spiral states of the t-J model with classical spins, Phys. Rev. B, 51(17), 11597-11602, 19950401
  21. The doping dependence of magnetic ordering in the t-J model with classical spins, Physica B, 206-207(1-4), 688-690, 19950401
  22. Magnetic phase diagram of a generalized Kondo lattice model with classical localized spins, J. Phys. Soc. Jpn., 65(2), 552-559, 19960201
  23. Nonuniform superconductivity due to the orbital magnetic effect in a d-wave superconductor in a magnetic field, Phys. Rev. B, 53(18), 12284-12298, 19960401
  24. A possibility of a new type of the Fulde-Ferrell-Larkin-Ovchinnikov state, Czech. J. Phys., 46, 561-564, 19960401
  25. ★, Fulde-Ferrell-Larkin-Ovchinnikov State in a Quasi-Two-Dimensional Organic Superconductor, J. Phys. Soc. Jpn., 66(3), 541-544, 19970301
  26. ★, Crossover from vortex states to the Fulde-Ferrell-Larkin-Ovchinnikov state in two-dimensional s- and d-wave superconductors, J. Phys. Soc. Jpn., 66(11), 3591-3599, 19971101
  27. ★, Structure of the Fulde-Ferrell-Larkin-Ovchinnikov State in Two-Dimensional Superconductors, J. Phys. Soc. Jpn., 67(3), 736-739, 19980301
  28. ★, Phase Fluctuations and Kosterlitz-Thouless Transition in Two-Dimensional Fulde-Ferrell-Larkin-Ovchinnikov Superconductors, J. Phys. Soc. Jpn., 67(6), 1872-1875, 19980601
  29. Stability of Fulde-Ferrell-Larkin-Ovchinnikov state in type-II superconductors against the phase fluctuations, Physica B, 259-261, 492-493, 19990401
  30. Exactly Aligned Magnetic Field and the Fulde-Ferrell-Larkin-Ovchinnikov State in Quasi-Low-Dimensional Superconductors, Journal of Superconductivity, 12(3), 469-473, 19990301
  31. Enhancement of the Upper Critical Field Due to a Fermi-Surface Effect in Quasi-Two-Dimensional Superconductors in Parallel Magnetic Fields, J. Phys. Soc. Jpn., 68(9), 3069-3075, 19990901
  32. Interplay of Fulde-Ferrell-Larkin-Ovchinnikov and Vortex states in two-dimensional Superconductors, J. Low Temp. Phys., 118(1-2), 91-104, 20000101
  33. Pseudogap due to antiferromagnetic fluctuations and the phase diagram of the high temperature oxide superconductors, J. Phys. Soc. Jpn., 69(6), 1598-1601, 20000601
  34. Nodeless d-wave superconductivity in a quasi-one-dimensional organic superconductor under anion order, Phys. Rev. B, 61(22), R14936-R14939, 20000401
  35. Superconductivity in a Ferromagnetic Layered Compound, Phys. Rev. B, 62(21), 14541-15546, 20000401
  36. Coexistence of Singlet and Triplet Attractive Channels in the Pairing Interactions Mediated by Antiferromagnetic Fluctuations, J. Phys. Soc. Jpn., 69(7), 1966-1969, 20000401
  37. Upper critical fields of quasi-low-dimensional superconductors with coexisting singlet and triplet pairing interactions in parallel magnetic fields, Phys. Rev. B, 62(5), 3524-3527, 20000401
  38. Triplet superconductivity induced by screened phonon interactions in ferromagnetic compounds, Europhys. Lett., 57, 247-253, 20020401
  39. Anisotropic superconductivity mediated by phonons in layered compounds with weak screening effect, Phys. Rev. B, 65, 174502, 20020401
  40. Enhancement of the upper critical field and a field induced superconductivity in antiferromagnetic conductors, J. Phys. Soc. Jpn., 71(3), 713-716, 20020301
  41. Temperature dependence of the upper critical field of an anisotropic singlet superconductivity in a square lattice tight-binding model in parallel magnetic fields, J. Phys. Soc. Jpn., 71(5), 1234-1237, 20020501
  42. Fulde-Ferrell-Larkin-Ovchinnikov state and field-induced superconductivity in an organic superconductor, J. Phys. Soc. Jpn., 71(7), 1644-1647, 20020401
  43. Upper critical field and field-induced superconductivity in layered superconductors with antiferromagnetic subsystems, Physica B, 329-333, 1442-1443, 20030401
  44. Internal Transition of Superconducting State by Impurity Doping with a Jump of Isotope Effect Coefficient in Multi-Band Superconductors, J. Phys. Soc. Jpn., 1843-1846, 20030801
  45. Isotope Effect of Superconductors with Coexisting Interactions of Phonon and Nonphonon mechanisms, J. Phys. Soc. Jpn., 1851-1854, 20030801
  46. Reduction of the Pauli paramagnetic pair-breaking effect in antiferromagnetic superconductors, Journal of the Physical Society of Japan, 2635-2638, 20041001
  47. Spin-Triplet Superconductivity Mediated by Phonons in Quasi-One-Dimensional Systems, Journal of the Physical Society of Japan, 3121-3128, 20041101
  48. Interlayer spin-singlet pairing induced by magnetic interactions in an antiferromagnetic superconductor, Physical Review B, 72, 134518 (7PAGES), 20051021
  49. Phase Transition without Spontaneous Symmetry Breaking between Hard and Soft Solid States, Journal of the Physical Society of Japan, 74(3), 823-826, 20070301
  50. Antiferromagnetic superconductors with effective mass anisotropy in magnetic fields, Physical Review B, 74, 024518 (10PAGES), 20060724
  51. Erratum: Antiferromagnetic superconductors with effective-mass anisotropy in magnetic fields, Physical Revew B, 75, 099902 (1PAGE), 20070328
  52. ★, Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors, Journal of the Physical Society of Japan, 76(5), 051005 (16 PAGES), 20070501
  53. FFLO state and exotic superconductors, 96巻(5号), 501-524, 20110801
  54. Interplay of Fulde-Ferrell-Larkin-Ovchinnikov and vortex states in two-dimensional superconductors, JOURNAL OF LOW TEMPERATURE PHYSICS, 118(1-2), 91-104, 200001
  55. Nodeless d-wave superconductivity in a quasi-one-dimensional organic superconductor under anion order, PHYSICAL REVIEW B, 61(22), 14936-14939, 20000601
  56. Pseudogap due to antiferromagnetic fluctuations and the phase diagram of high-temperature oxide superconductors, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 69(6), 1598-1601, 200006
  57. Coexistence of singlet and triplet attractive channels in the pairing interactions mediated by antiferromagnetic fluctuations, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 69(7), 1966-1969, 200007
  58. Upper critical fields of quasi-low-dimensional superconductors with coexisting singlet and triplet pairing interactions in parallel magnetic fields, PHYSICAL REVIEW B, 62(5), 3524-3527, 20000801
  59. Superconductivity in a ferromagnetic layered compound, PHYSICAL REVIEW B, 62(21), 14541-14546, 20001201
  60. ★, Fulde-Ferrell-Larkin-Ovchinnikov state and field-induced superconductivity in an organic superconductor, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 71(7), 1644-1647, 200207
  61. Triplet superconductivity induced by screened phonon interactions in ferromagnetic compounds, EUROPHYSICS LETTERS, 57(2), 247-253, 200201
  62. Enhancement of the upper critical field and a field-induced superconductivity in antiferromagnetic conductors, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 71(3), 713-716, 200203
  63. Anisotropic superconductivity mediated by phonons in layered compounds with weak screening effects, PHYSICAL REVIEW B, 65(17), 20020501
  64. Temperature dependence of the upper critical field of anisotropic singlet superconductivity in a square lattice tight-binding model in parallel magnetic fields, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 71(5), 1234-1237, 200205
  65. Upper critical field and field-induced superconductivity in layered superconductors with antiferromagnetic subsystems, PHYSICA B-CONDENSED MATTER, 329, 1442-1443, 200305
  66. Internal transition of superconducting state by impurity doping with a jump of isotope-effect coefficient in multiband superconductors, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 72(8), 1843-1846, 200308
  67. Isotope effect in superconductors with coexisting interactions of phonon and nonphonon mechanisms, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 72(8), 1851-1854, 200308
  68. Reduction of Pauli paramagnetic pair-breaking effect in antiferromagnetic superconductors, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 73(10), 2635-2638, 200410
  69. Spin-triplet superconductivity mediated by phonons in quasi-one-dimensional systems, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 73(11), 3121-3128, 200411
  70. Phase transition without spontaneous symmetry breaking between hard and soft solid states, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 74(3), 823-826, 200503
  71. Interlayer spin-singlet pairing induced by magnetic interactions in an antiferromagnetic superconductor, PHYSICAL REVIEW B, 72(13), 200510
  72. Antiferromagnetic superconductors with effective-mass anisotropy in magnetic fields, PHYSICAL REVIEW B, 74(2), 200607
  73. ★, Fulde-Ferrell-Larkin-Ovchinnikov state in heavy fermion superconductors, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 76(5), 200705
  74. Phase Diagrams of Noncentrosymmetric Superconductors, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 82(2), 201302
  75. Dimensional Crossover of the Fulde-Ferrell-Larkin-Ovchinnikov State in Strongly Pauli-Limited Quasi-One-Dimensional Superconductors, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83(2), 201402
  76. Temperature Dependence of the Spin Susceptibility in Noncentrosymmetric Superconductors with Line Nodes, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83(4), 201404
  77. Stabilization of Long-Range Order by Additional Anisotropic Spins in Two-Dimensional Isotropic Heisenberg Antiferromagnets - A Possible Model of an Organic Compound with Magnetic Anions, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83(11), 20141115
  78. Odd- and Even-Frequency Superconductivities Mediated by Ferromagnetic Magnons, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83(12), 20141215
  79. Stabilization of Long-Range Order by Additional Anisotropic Spins in Two-Dimensional Isotropic Heisenberg Antiferromagnets —A Possible Model of an Organic Compound with Magnetic Anions—, Journal of the Physical Society of Japan, 83(11), 20141014
  80. Erratum: "Odd- and Even-Frequency Superconductivities Mediated by Ferromagnetic Magnon" [J. Phys. Soc. Jpn. 83, 123704 (2014)], Journal of the Physical Society of Japan, 84(5), 201506
  81. Mean Field Theory of a Coupled Heisenberg Model and Its Application to an Organic Antiferromagnet with Magnetic Anions, Journal of the Physical Society of Japan, 85, 024704-1-024704-7, 20160106
  82. Spin-Flop Transition and a Tilted Canted Spin Structure in a Coupled Antiferromagnet, Journal of the Physical Society of Japan, 85, 043708-1-043708-2, 20160330
  83. Mean Field Theory of a Coupled Heisenberg Model and Its Application to an Organic Antiferromagnet with Magnetic Anions, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 85(2), 20160315
  84. Spin-Triplet Pairing Induced by Spin-Singlet Interactions in Noncentrosymmetric Superconductors, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 86(2), 20170215
  85. On Scaling Relations of Organic Antiferromagnets with Magnetic Anions, Journal of the Physical Society of Japan, 86, 043704-1-043704-5, 20170330
  86. On Scaling Relations of Organic Antiferromagnets with Magnetic Anions, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 86(4), 20170415
  87. Spin Structures and Phase Diagrams of Extended Spatially Completely Anisotropic Triangular Lattice Antiferromagnets, Journal of the Physical Society of Japan, 86, 124709-1-124709-7, 20171110
  88. Spin Structures and Phase Diagrams of Extended Spatially Completely Anisotropic Triangular Lattice Antiferromagnets, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 86(12), 20171215
  89. Spin Wave Theory in Two-Dimensional Coupled Antiferromagnets, Journal of the Physical Society of Japan, 87(4), 043702-1-043702-5, 20180313
  90. Spin Wave Theory in Two-Dimensional Coupled Antiferromagnets, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 87(4), 20180415
  91. Stabilization of the Fulde-Ferrell-Larkin-Ovchinnikov State by Tuning In-plane Magnetic-Field Direction: Application to a Quasi-One-Dimensional Organic Superconductor, Journal of the Physical Society of Japan, 87(8), 083701-1-083701-5, 20180709
  92. Stabilization of the Fulde-Ferrell-Larkin-Ovchinnikov State by Tuning In-plane Magnetic-Field Direction: Application to a Quasi-One-Dimensional Organic Superconductor, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 87(8), 20180815
  93. Critical Phenomena in Coupled Magnetic Systems -Application to the Organic Antiferromagnet lambda-(BETS)(2)FeCl4-, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 88(4), 20190415
  94. Fulde-Ferrell-Larkin-Ovchinnikov State in Quasi-One-Dimensional Systems: Correlation between Fermi-Surface Distortion and Optimal In-Plane Magnetic-Field Direction, Journal of the Physical Society of Japan, 89(2), 024708-1-024708-8, 20200129
  95. Scaling Theory for Critical Phenomena in Coupled Magnetic Systems - Critical Exponents of pi-d Antiferromagnets -, Journal of the Physical Society of Japan, 89(04), 043001-1-043001-5, 20200306
  96. Vestigial Van Hove Singularity and Higher-Temperature Superconducting Phase Induced by Perpendicular Uniaxial Pressures in Quasi-Two-Dimensional Superconductors, Journal of the Physical Society of Japan, 89(09), 093704-1-093704-5, 20200812
  97. Vestigial Van Hove Singularity and Higher-Temperature Superconducting Phase Induced by Perpendicular Uniaxial Pressures in Quasi-Two-Dimensional Superconductors, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 89(9), 20200915
  98. Fulde-Ferrell-Larkin-Onhinnikov State in Perpendicular Magnetic Fields in Strongly Pauli-Limited Quasi-Two-Dimensional Superconductors, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 90(4), 20210415
  99. Stability of Mixed-Symmetry Superconducting States with Broken Time-Reversal Symmetry against Lattice Distortions, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 90(6), 20210615

Invited Lecture, Oral Presentation, Poster Presentation

  1. Magnetic torque in coupled antiferromagnets in a spin-flop-cross-over regime, Hiroshi Shimahara, 2023/03/24, Without Invitation, Japanese, Japanese Physical Society
  2. Magnetic torque and spin-flop transition in complex antiferromagnets, Hiroshi Shimahara, 2022/09/13, Without Invitation, Japanese, Japanese Physical Society
  3. Correlation between Fermi-surface Distortion and Optimal In-Plane Magnetic Field Direction in The Fulde-Ferrell-Larkin-Ovchinnikov State in Quasi-One-Dimensional Superconductors, 2021/03, Without Invitation, Japanese
  4. Theory of critical phenomena in coupled magnets, Hiroshi Shimahara, 2019/03/14, Without Invitation, Japanese
  5. Perturbation theory in extended Kondo lattice model and the application to quasi-two-dimensional organic conductors, Yuki Kohno and Hiroshi Shimahara, 2019/03/14, Without Invitation, Japanese
  6. In-plane magnetic field angle dependence and phase diagram of the FFLO state in quasi-organic superconductors, Katsumi Itahashi and Hiroshi Shimahara, 2019/03/14, Without Invitation, Japanese
  7. Theory of critical phenomena in coupled antiferromagnets, Hiroshi Shimahara, 2018/09/09, Without Invitation, Japanese
  8. Perturbation theory in extended Kondo lattice model and its application to the organic antiferromagnets, Yuki Kohno and Hiroshi Shimahara, 2018/09/09, Without Invitation, Japanese
  9. Statility of the FFLO state in quasi-one-dimensional superconductors in in-plane magnetic field, Katsumi Itahashi and Hiroshi Shimahara, 2018/09/09, Without Invitation, Japanese
  10. Order parameter mixing effect on the FFLO state of quasi-one-dimensional supercondoctors, 2016/03/21, Without Invitation, Japanese
  11. Phase transitions of anisotropic coupled magnetic systems in magnetic field, Hiroshi Shimahara, Kazuhiro Ito, 71th Annual Meeting, Japanese Physical Society of Japan, 2016/03/19, Without Invitation, Japanese
  12. Fulde-Ferrell-Larkin-Ovchinnikov state in quasi-low-dimensional superconductors, Hiroshi Shimahara, March Meeting 2005 of American Physical Society, 2005/03, With Invitation, English, Americal Physical Society, Los Angels
  13. Stability of mixed-symmetry superconducting states with broken time-reversal symmetry against lattice distortions, 2021/09/23, Without Invitation, Japanese