Seiji Higashitani

Last Updated :2025/01/07

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Professor
E-mail
ultphiroshima-u.ac.jp
Self-introduction
I am theoretically studying the physics of superconductivity and superfluidity. In particular, I am interested in quantum phenomena occurring at the interface (or surface) of superconducting and superfluid materials. At the interface of superconducting materials, quantum states appear that cannot exist inside the materials (localized at the interface). Similar quantum states also appear in the superfluid phase of liquid Helium-3. Such interfacial quantum states show various properties reflecting the individuality of materials, and this diversity makes the physics of superconductivity and superfluidity very rich and fascinating.

Basic Information

Academic Degrees

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

Educational Activity

  • [Bachelor Degree Program] School of Integrated Arts and Sciences : Department of Integrated Arts and Sciences : Integrated Arts and Sciences
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Quantum Matter Program
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Transdisciplinary Science and Engineering Program
  • [Doctoral 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 : Transdisciplinary Science and Engineering Program

Research Fields

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

Educational Activity

Course in Charge

  1. 2024, Liberal Arts Education Program1, 1Term, General　Mechanics I
  2. 2024, Liberal Arts Education Program1, 3Term, General　Mechanics II
  3. 2024, Undergraduate Education, 2Term, Seminar in Physical Sciences I
  4. 2024, Undergraduate Education, 1Term, Introduction to Physical Sciences
  5. 2024, Undergraduate Education, 1Term, Quantum Mechanics II
  6. 2024, Undergraduate Education, 2Term, Seminar in Quantum Mechanics II
  7. 2024, Undergraduate Education, 2Term, Frontiers of Material Science
  8. 2024, Graduate Education (Master's Program) , First Semester, Special Exercises of Advanced Science and Engineering Transdisciplinary Science and Engineering A
  9. 2024, Graduate Education (Master's Program) , Second Semester, Special Exercises of Advanced Science and Engineering Transdisciplinary Science and Engineering B
  10. 2024, Graduate Education (Master's Program) , 3Term, Transdisciplinary Science and Engineering Program Common Subjects 2 (Green Development)
  11. 2024, Graduate Education (Master's Program) , 3Term, Spectroscopies of Correlated Matter

Research Activities

Academic Papers

  1. Lifetime of edge modes at rough surfaces of chiral superconductors, Physical Review B, 110, 224506, 20241209
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  2. Frictional motion of normal-fluid component of superfluid He-3 in aerogel, PHYSICAL REVIEW B, 82(5), 20100825
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  3. ★, Surface Majorana Cone of the Superfluid He-3 B Phase, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 80(1), 201101
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  4. Subgap in the Edge States of Two-Dimensional Chiral Superconductor with Rough Surface, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 80(11), 201111
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  5. ★, Odd-frequency Cooper pairs and zero-energy surface bound states in superfluid He-3, PHYSICAL REVIEW B, 85(2), 20120112
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  6. ★, Knudsen-to-Hydrodynamic Crossover in Liquid He-3 in a High-Porosity Aerogel, PHYSICAL REVIEW LETTERS, 108(22), 20120601
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  7. ★, Magnetic Response of Odd-Frequency s-Wave Cooper Pairs in a Superfluid Proximity System, PHYSICAL REVIEW LETTERS, 110(17), 20130423
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  8. Quasi-classical theory of rough surface effects on unconventional BCS states., Czechoslovak J. Phys., 46(S2), 1059-1060, 19960401
  9. Impurity scattering effect on superfluidity of 3He in aerogel, J. Low Temp. Phys., 114(1/2), 161-172, 19990101
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  10. Phase diagram of the Fulde-Ferrell-Larkin-Ovchinnikov state in a three-dimensional superconductor, J. Phys. Soc. Jpn., 67(1), 280-289, 19980115
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  11. ★, Mechanism of paramagnetic Meissner effect in high-temperature superconductors, J. Phys. Soc. Jpn., 66(9), 2556-2559, 19970901
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  12. ★, Theory of rough surface effects on the anisotropic BCS states, J. Low Temp. Phys., 103(1/2), 1-22, 19960401
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  13. Rough surface effects on d-wave superconductors, J. Phys. Soc. Jpn., 65(6), 1540-1543, 19960615
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  14. ★, Meissner effect in normal-superconducting proximity-contact double layers, J. Phys. Soc. Jpn., 64(2), 549-564, 19950215
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  15. Meissner effect in clean proximity-contact N-S double layer, Physica B, 194-196, 1385-1386, 19940401
  16. Quasi-classical theory of the Andreev reflection at the N-S interface, Physica C, 185-189, 1451-1452, 19910401
  17. Impurity effect on the order parameter collective mode in superfluid 3He in aerogel, AIP Conf. Proc., 850, 249-250, 20060901
  18. Fulde-Ferrell-Larkin-Ovchinnikov state in thin films with rough surfaces, AIP Conf. Proc., 850, 733-734, 20060901
  19. Raman spectra of p-wave superconductors with non-magnetic impurities, AIP Conf. Proc., 850, 581-582, 20060901
  20. Surface condition dependence of transverse acoustic impedance in superfluid 3He, Journal of Physics: Conference Series, 150, 032070(1–4), 20090301
  21. Odd-frequency Cooper pairs near the surfaces of superuid 3He-B, Journal of Physics: Conference Series, 400, 012018, 20121201
  22. Low Temperature Properties of the Mermin-Ho Texture of Superuid 3He-A in a Cylinder, Journal of Physics: Conference Series, 400, 012054, 20121201
  23. Drag Force on a High Porosity Aerogel in Liquid 3He, Journal of Physics: Conference Series, 400, 012071, 20121201
  24. Superfluid density in He-3 film, PHYSICA B, 284, 271-272, 200007
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  25. Order parameter collective modes in Sr2RuO4, PHYSICA B, 284, 539-540, 200007
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  26. Effect of finite reflection at the interface on diamagnetic response of normal-superconducting proximity contact double layers, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 69(11), 3493-3496, 200011
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  27. Collision drag effect on propagation of sound in liquid He-3 in aerogel, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 70(12), 3483-3486, 200112
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  28. Rough surface effect on Meissner diamagnetism in normal-layer of N-S proximity-contact system, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 71(1), 293-299, 200201
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  29. Transverse sound in liquid-He-3-aerogel system, PHYSICAL REVIEW LETTERS, 89(21), 20021118
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  30. Viscoelastic theory of liquid He-3 in aerogel, PHYSICA B-CONDENSED MATTER, 329, 299-300, 200312
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  31. A-B transition of superfluid He-3 in aerogel under magnetic field, PHYSICA B-CONDENSED MATTER, 329, 301-302, 200312
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  32. Rough surface effect on diamagnetic response of normal-superconducting proximity contact system with arbitrary concentration of impurities, JOURNAL OF LOW TEMPERATURE PHYSICS, 132(3-4), 147-165, 200308
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  33. Collision drag effect on two-fluid hydrodynamics of superfluid He-3 in aerogel, JOURNAL OF LOW TEMPERATURE PHYSICS, 134(3-4), 843-850, 200402
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  34. Fourth sound propagation in superfluid He-3 in aerogel, JOURNAL OF LOW TEMPERATURE PHYSICS, 138(1-2), 147-152, 200501
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  35. NMR properties of a possible non-unitary state of superfluid He-3 in aerogel, JOURNAL OF LOW TEMPERATURE PHYSICS, 138(1-2), 153-157, 200501
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  36. Theory of acoustic impedance of superfluid He-3, JOURNAL OF LOW TEMPERATURE PHYSICS, 138(1-2), 349-354, 200501
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  37. Microscopic theory of sound propagation in the superfluid He-3-aerogel system, PHYSICAL REVIEW B, 71(13), 200504
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  38. Observation of surface Andreev bound states of superfluid He-3 by transverse acoustic impedance measurements, PHYSICAL REVIEW LETTERS, 95(7), 20050812
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  39. Sound propagation in superfluid He-3 in aerogel, JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 66(8-9), 1334-1338, 2005
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  40. Transverse acoustic impedance of superfluid He-3-B, JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 66(8-9), 1352-1354, 2005
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  41. Raman spectra of spin-triplet superconductor Sr2RuO4, PHYSICA B-CONDENSED MATTER, 383(1), 82-83, 20060815
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  42. Effect of order parameter collective mode on electronic Raman spectra of spin-triplet superconductor Sr2RuO4, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 76(3), 200703
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  43. Ultrasound attenuation of superfluid He-3 in aerogel, PHYSICAL REVIEW LETTERS, 98(22), 20070601
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  44. Theory of transverse acoustic impedance of superfluid He-3, JOURNAL OF LOW TEMPERATURE PHYSICS, 149(5-6), 294-313, 200712
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  45. Surface Bound States in Superfluid He-3, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77(11), 200811
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  46. ★, Proximity Effect between a Dirty Fermi Liquid and Superfluid He-3, JOURNAL OF LOW TEMPERATURE PHYSICS, 155(1-2), 83-97, 200904
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  47. New Anomaly in the Transverse Acoustic Impedance of Superfluid He-3-B with a Wall Coated by Several Layers of He-4, PHYSICAL REVIEW LETTERS, 103(15), 20091009
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  48. Frictional Relaxation Time of He-3 Normal Fluid Component in Aerogel Obtained by Fourth Sound Resonance, JOURNAL OF LOW TEMPERATURE PHYSICS, 158(1-2), 182-187, 201001
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  49. ★, Strong Anisotropy in Spin Suceptibility of Superfluid He-3-B Film Caused by Surface Bound States, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 78(12), 200912
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  50. Odd-frequency pairing effect on the superfluid density and the Pauli spin susceptibility in spatially nonuniform spin-singlet superconductors, PHYSICAL REVIEW B, 89(18), 20141209
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  51. Spin Current as a Manifestation of Surface Odd-Frequency Pairing in Superfluid He-3, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83(7), 201407
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  52. Fermi surface effect on spontaneous breaking of time-reversal symmetry in unconventional superconducting films, PHYSICAL REVIEW B, 91(9), 20150323
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  53. Spin-Dependent Acoustic Response in the Nonunitary A(1) and A(2) Phases of Superfluid He-3 under High Magnetic Fields, PHYSICAL REVIEW LETTERS, 114(10), 20150310
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  54. Phase Transition to a Time-Reversal Symmetry-Breaking State in d-Wave Superconducting Films with Rough Surfaces, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 84(3), 20150315
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  55. Temperature Dependence of the Critical Thickness of d-Wave Superconducting Films, Physics Procedia, 65, 25, 2015
  56. Rough Surface Effect on a Broken Time-reversal Pairing State in d-wave Superconducting Films, Physics Procedia, 65, 169, 2015
  57. Multiple Phase Transition in Unconventional Superconducting Films, JOURNAL OF LOW TEMPERATURE PHYSICS, 187(5-6), 545-552, 201706
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  58. Subgap in the Surface Bound States Spectrum of Superfluid He-B with Rough Surface, JOURNAL OF LOW TEMPERATURE PHYSICS, 190(5-6), 277-301, 201803
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  59. Influence of diffuse surface scattering on the stability of superconducting phases with spontaneous surface current generated by Andreev bound states, PHYSICAL REVIEW B, 98(13), 201810
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  60. Surface Bound States and Spontaneous Edge Currents in Chiral Superconductors: Effect of Spatially Varying Order Parameter, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 89(3), 20200315
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