これまでの担当講義はこちら

学会活動など
所属学会：日本物理学会、日本真空表面学会、応用物理学会

2013～2015年, 2019　表面科学講演大会　運営委員
2014～2017, 2022~2025年　UVSOR利用者懇談会世話人
2014, 2016, 2019　International advisory and program Committee, ICFSI-15, 16 & 17
2015～2016年　日本物理学会領域9運営委員
2016〜2023年　日本表面真空学会、日本表面科学会　会誌編集委員
2018〜2023年　固体物理　誌友
2020〜2021　日本物理学会 新著紹介小委員会委員

2021〜　Editorial Board, communications materials

2023〜　日本表面真空学会関東支部 支部役員

2025年　JVSS学術講演会　実行委員


賞罰
　1. 第8回応用物理学会 薄膜・表面分科会 論文賞, 2024

　2. 文部科学大臣表彰若手科学者賞, 2019
　3. 東京工業大学挑戦的研究賞, 2017
　4. Highly Valued Reviewer, Surface Science, 2014
　5. 日本表面科学会第20回(2010年度)奨励賞“ビスマス量子薄膜における表面状態による電気伝導”
　6. 日本物理学会第3回(2009年度、領域9)若手奨励賞“ビスマス超薄膜におけるスピン偏極電子状態と表面電気伝導の研究”

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​発表論文(2013年度まで)

1. N. Nagamura, R. Hobara, T. Uetake, T. Hirahara, M. Ogawa, T. Okuda, K. He, P. Moras, P. M. Sheverdyaeva, C. Carbone, K. Kobayashi, I. Matsuda, and S. Hasegawa, “Anisotropic Electronic Conduction in Metal Nanofilms Grown on a One-Dimensional Surface
 Superstructure”,
 Physical Review B 89, 125415 (2014).

2. T. Tono, T. Hirahara, and S. Hasegawa, “In situ transport measurements on ultrathin Bi(111) films using a magnetic tip: Possible detection of current-induced spin polarization in the surface states”, New Journal of Physics 15, 105018 (2013).

3. M. Aitani, Y. Sakamoto, T. Hirahara, M. Yamada, H. Miyazaki, M. Matsunami, S. Kimura, and S. Hasegawa, “Fermi level tuning of topological insulator thin films”, 
Japanese Journal of Applied Physics 52, 110112 (2013).

4. M. Yamada, T. Hirahara, and S. Hasegawa, “Magnetoresistance Measurements of a Superconducting Surface State of In-Induced and Pb-Induced Structures on Si(111)”, Physical Review Letters 110, 237001 (2013).

5. P. De Padova, P. Vogt, A. Resta, J. Avila, I. Razado-Colambo, C. Quaresima, C. Ottaviani, B. Olivieri, T. Bruhn, T. Hirahara, T. Shirai, S. Hasegawa, M. C. Asensio, and G. Le Lay, “Evidence of Dirac fermions in multilayer silicene”, Applied Physics Letters 102, 163106 (2013).

6. T. Shirasawa, J. Tsunoda, T. Hirahara, and T. Takahashi, “Structure of Bi/Bi2Te3 heteroepitaxial film studied by x-ray crystal truncation rod scattering”, Physical Review B 87, 075449 (2013).

7. T. Hirahara, N. Fukui, T. Shirasawa, M. Yamada, M. Aitani, H. Miyazaki, M. Matsunami, S. Kimura, T. Takahashi, S. Hasegawa, and K. Kobayashi, “Atomic and Electronic Structure of Ultrathin Bi(111) Films Grown on Bi2Te3(111) Substrates: Evidence for a Strain-Induced Topological Phase Transition”, Physical Review Letters 109, 227401 (2012). Erratum: Physical Review Letters 110, 149901 (2013).

8. M. Yamada, T. Hirahara, S. Hasegawa, H. Mizuno, Y. Miyatake, and T. Nagamura, ”Surface Electrical Conductivity Measurement System with Micro-Four-Point Probes at Sub-Kelvin Temperature under High Magnetic Field in Ultrahigh Vacuum”, e-Journal of Surface Science and Nanotechnology 10, 400 (2012).

9. T. Uetake, T. Hirahara, Y. Ueda, N. Nagamura, R. Hobara, and S. Hasegawa, “Anisotropic conductivity of the Si(111)4×1-In surface: Transport mechanism determined by the temperature dependence”, Physical Review B　86, 035325 (2012).

10. Y. Fukaya, K. Kubo, T. Hirahara, S. Yamazaki, W. H. Choi, H. W. Yeom, A. Kawasuso, S. Hasegawa, and I. Matsuda, “Atomic and Electronic Structures of Si(111)-√21×√21 Superstructure”, e-Journal of Surface Science and Nanotechnology 10, 310-314 (2012).

11. Y. Fukaya, I. Matsuda, M. Hashimoto, H. Narita, K. Kubo, T. Hirahara, S. Yamazaki, W. H. Choi, H. W. Yeom, S. Hasegawa, A. Kawasuso, and A. Ichimiya, “Atomic and electronic structures of two-dimensional binary surface alloy: Si(111)-r21xr21 superstructure”, Surface Science 606, 919 (2012).

12. N. Fukui, T. Hirahara, T. Shirasawa, T. Takahashi, K. Kobayashi, and S. Hasegawa, “Surface Relaxation of Topological Insulators: Influence on the Electronic Structure”, Physical Review B 85, 115426 (2012).

13. M. D’Angelo, R. Yukawa, K. Ozawa, S. Yamamoto, T. Hirahara, S. Hasegawa, M. G. Silly, F. Sirotti, and I. Matsuda, “Hydrogen-Induced Surface Metallization of SrTiO3(001)”, Physical Review Letters 108, 116802 (2012).

14. T. Hirahara, G. Bihlmayer, Y. Sakamoto, M. Yamada, H. Miyazaki, S. Kimura, S. Blugel, S. Hasegawa, “Interfacing 2D and 3D topological insulators: Bi(111) bilayer on Bi2Te3”, Physical Review Letters 107, 166801 (2011).

15. Y. Saisyu, T. Hirahara, R. Hobara, S. Hasegawa, “Manipulation of magnetic anisotropy of Co ultrathin films by substrate engineering”, Journal of Applied Physics 110, 053902 (2011).

16. N. Miyata, H. Narita, M. Ogawa, A. Harasawa, R. Hobara, T. Hirahara, P. Moras, D. Topwal, C. Carbone, S. Hasegawa, and I. Matsuda, “Enhanced spin relaxation in a quantum metal film by the Rashba-type surface”, Physical Review B　83, 195305 (2011).

17. 長谷川修司、平原徹 "トポロジカル絶縁体は本当か ―実験から見て―" 表面科学　32, 216 (2011)

18. N. Miyata, R. Hobara, H. Narita, T. Hirahara, S. Hasegawa, and I. Matsuda, “Development of surface magneto-transport measurement with micro-four-point probe method and the measurement of Bi nanofilm on Si(111)” Japanese Journal of Applied Physics 50, 036602 (2011).

19. 村上修一、平原徹、松田巌 "トポロジカル絶縁体の物理" 日本物理学会誌 Vol. 65, No. 11, 840 (2010).

20. I. Matsuda, K. Kubo, F. Nakamura, T. Hirahara, S. Yamazaki, W. H. Choi, H. W. Yeom, H. Narita, Y. Fukaya, M. Hashimoto, A. Kawasuso, S. Hasegawa, and K. Kobayashi, “Electron compound nature in a surface atomic layer of two-dimensional triangle lattice”, Physical Review B 82, 165330 (2010).

21. 武市泰男、何珂、奥田太一、平原徹、柿崎明人、松田巌 “ラシュバ分裂した表面状態との混成により誘起された金属量子井戸状態のスピン分裂” 表面科学　31, 493 (2010).

22. T. Hirahara, Y. Sakamoto, Y. Takeichi, H. Miyazaki, S. Kimura, I. Matsuda, A. Kakizaki, and S. Hasegawa, “Anomalous transport in an n-type topological insulator ultrathin Bi2Se3 film”, Physical Review B 82, 155309 (2010) (editors’ suggestions).

23. H. Morikawa, K. S. Kim, Y. Kitaoka, T. Hirahara, S. Hasegawa and H. W. Yeom, “Conductance transition and interwire ordering of Pb nanowires on Si(557)”, Physical Review B 82, 045423 (2010).

24. Y. Niinuma, Y. Saisyu, T. Hirahara, R. Hobara, S. Hasegawa, H. Mizuno, and T. Nagamura, “Development of an UHV-SMOKE system using permanent magnets”, e-Journal of Surface Science and Nanotechnology 8, 298(2010).

25. A. Nishide, Y. Takeichi, T. Okuda, A. A. Taskin, T. Hirahara, K. Nakatsuji, F. Komori, A. Kakizaki, Y. Ando, and I. Matsuda, “Spin-polarized surface bands of a three-dimensional topological insulator studied by high-resolution spin- and angle-resolved photoemission spectroscopy”, New Journal of Physics 12, 065011 (2010).

26. Y. Sakamoto, T. Hirahara, H. Miyazaki, S. Kimura, and S. Hasegawa, “Spectroscopic evidence of a topological quantum phase transition in ultrathin Bi2Se3 films”, Physical Review B, 81, 165432(2010).

27. K. He, Y. Takeichi, M. Ogawa, T. Okuda, P. Moras, D. Topwal, A. Harasawa, T. Hirahara, C. Carbone, A. Kakizaki, and I. Matsuda, “Direct spectroscopic evidence of spin-dependent hybridization between Rashba-split surface states and quantum-well states”, Physical Review Letters, 104, 156805 (2010).

28. T. Hirahara, Y. Sakamoto, Y. Saisyu, H. Miyazaki, S. Kimura, T. Okuda, I. Matsuda, S. Murakami, and S. Hasegawa, “Topological metal at the surface of an ultrathin Bi1-xSbx alloy film”, Physical Review B 81, 165422(2010)　(editors’ suggestions).

29. A. Nishide, A. A. Taskin, Y. Takeichi, T. Okuda, A. Kakizaki, T. Hirahara, K. Nakatsuji, F. Komori, Y. Ando, and I. Matsuda, “Direct mapping of the spin-filtered surface bands of a three-dimensional quantum spin Hall insulator” Physical Review B　81, 041309(R) (2010) (editors’ suggestions). Erratum: Physical Review B 82, 039901(2010)

30. T. Shibasaki, N. Nagamura, T. Hirahara, H. Okino, S. Yamazaki, W. Lee, H. Shim, R. Hobara, I. Matsuda, G. Lee, and S. Hasegawa, “Phase transition temperatures determined by different experimental methods: Si(111)4x1-In surface with defects”, Physical Review B 81, 035314 (2010).

31. T. Hirahara, T. Komorida, Y. Gu, F. Nakamura, H. Izuchi, H. Morikawa, and S. Hasegawa, “Insulating conduction in Sn/Si(111): Possibility of a Mott insulator and metallization/localization induced by carrier doping” Physical Review B 80, 235419 (2009) (editors’ suggestions).

32. 平原徹, “ビスマス超薄膜の電子構造: Rashba 効果と量子サイズ効果及びその協奏”, 真空 52, 582 (2009).

33. Y. Kitaoka, T. Tono, S. Yoshimoto, T. Hirahara, S. Hasegawa, and T. Ohba, “Direct detection of grain boundary scattering in damascene Cu wires by nanoscale four-point probe resistance measurements” Applied Physics Letters 95, 052110(2009).

34. 平原徹、松田巌、山崎詩郎、長谷川修司, “Bi超薄膜における表面状態による電気伝導” 表面科学 30, 374(2009)

35. M. D’angelo, K. Takase, N. Miyata, T. Hirahara, S. Hasegawa, A. Nishide, M. Ogawa, and I. Matsuda, “Conductivity of the Si(111)7×7 dangling-bond state”, Physical Review B, 79 035318(2009).

36. N. Miyata, K. Horikoshi, T. Hirahara, S. Hasegawa, C. M. Wei, and I. Matsuda, “Electron Transport Property of Quantum-well States in Ultrathin Pb(111) films”, Physical Review B 78, 245405(2008).

37. C. Liu, I. Matsuda, T. Hirahara, S. Hasegawa, J. Okabayashi, S. Toyoda, and M. Oshima,“Band-bending inhomogeneity of Au adsorbed Si(111)-√3×√3-Ag evaluated with Si 2p core-level spectra”, Surface Science 602, 3316(2008).

38. K. He, T. Hirahara, T. Okuda, S. Hasegawa, A. Kakizaki, and I. Matsuda, “Spin-polarization of quantum well states in Ag films induced by Rashba effect at surface”, Physical Review Letters 101, 107604 (2008).

39. T. Hirahara, K. Miyamoto, A. Kimura, Y. Niinuma, G. Bihlmayer, E. V. Chulkov, T. Nagao, I. Matsuda, S. Qiao, K. Shimada, H. Namatame, M. Taniguchi, and S. Hasegawa, “Origin of the surface-state band-splitting in ultrathin Bi films: From a Rashba effect to a parity effect”, New Journal of Physics 10, 083038 (2008).

40. T. Hirahara, T. Komorida, A. Sato, G. Bihlmayer, E. V. Chulkov, K. He, I. Matsuda, and S. Hasegawa, “Manipulating quantum-well states by surface alloying: Pb on ultrathin Ag films”, Physical Review B　78, 035408 (2008).

41. Y. Nakayama, K. Takase, T. Hirahara, S. Hasegawa, T. Okuda, A. Harasawa, I. Matsuda, Y. Nakamura, and M. Ichikawa, “Quantum-Size Effect in Uniform Ge-Sn Alloy Nanodots Observed by Photoemission Spectroscopy”, Japanese Journal of Applied Physics 46, L1176(2007).

42. T. Hirahara, I. Matsuda, S. Yamazaki, N. Miyata, S. Hasegawa, and T. Nagao, “Large surface-state conductivity in ultrathin Bi films”, Applied Physics Letters 91, 202106 (2007).

43. T. Hirahara, K. Miyamoto, I. Matsuda, T. Kadono, A. Kimura, T. Nagao, G. Bihlmayer, E. V. Chulkov, S. Qiao, K. Shimada, H. Namatame, M. Taniguchi, and S. Hasegawa, “Direct observation of spin-splitting in bismuth surface states”, Physical Review B 76, 153305 (2007).

44. I. Matsuda, C. Liu, T. Hirahara, M. Ueno, T. Tanikawa, T. Kanagawa, R. Hobara, S. Yamazaki, S. Hasegawa, and K. Kobayashi, “Electron-phonon interaction and localization of surface-state carriers in a metallic monolayer”, Physical Review Letters 99, 146805 (2007).

45. Y. Nakayama, S. Yamazaki, H. Okino, T. Hirahara, I. Matsuda, S. Hasegawa, and M. Ichikawa, “Electrical conduction of Ge nanodot arrays formed on an oxidized Si surface”, Applied Physics Letters　91, 123104 (2007).

46. H. Kakuta, T. Hirahara, I. Matsuda, T. Nagao, S. Hasegawa, N. Ueno, and K. Sakamoto, “Electronic Structures of the Highest Occupied Molecular Orbital Bands of a Pentacene Ultrathin film”, Physical Review Letters 98, 247601(2007).

47. T. Hirahara, T. Nagao, I. Matsuda, G. Bihlmayer, E. V. Chulkov, Yu. M. Koroteev, and S. Hasegawa, “Quantum well states in ultrathin Bi films: Angle-resolved photoemission spectroscopy and first principles calculations study”, Physical Review B 75, 035422(2007).

48. T. Hirahara, T. Nagao, I. Matsuda, G. Bihlmayer, E. V. Chulkov, Yu. M. Koroteev, P. M. Echenique, M. Saito, and S. Hasegawa, “Role of Spin-Orbit Coupling and Hybridization Effects in the Electronic Structure of Ultrathin Bi films”, Physical Review Letters 97, 146803(2006).

49. N. Nagamura, I. Matsuda, N. Miyata, T. Hirahara, S. Hasegawa, and T. Uchihashi, “Quasi-one-dimensional quantized states in an epitaxial Ag film on a one-dimensional surface superstructure”, Physical Review Letters 96, 256801(2006).

50. T. Hirahara, I. Matsuda, C. Liu, R. Hobara, S. Yoshimoto, and S. Hasegawa, “Direct measurement of the Hall effect in a free-electron-like surface state”, Physical Review B 73, 235332(2006).

51. 松田巌、上野将司、平原徹、保原麗、守川春雲、劉燦華、長谷川修司,「結晶表面上単原子ステップの電気抵抗」表面科学 27, 182(2006).

52. I. Matsuda, T. Hirahara, M. Ueno, R. Hobara and S. Hasegawa, “Electrical Conduction through a Monatomic Step”, Journal de Physique IV 132, 57 (2006).

53. I. Matsuda, T. Hirahara, M. Konishi, C. Liu, H. Morikawa, M. D’angelo, S. Hasegawa, T. Okuda, and T. Kinoshita, “Evolution of Fermi surface by electron filling into a free-electronlike surface state”, Physical Review B 71, 235315(2005).

54. R. Tamura, M. Ikuta, T. Hirahara, and M. Tsukada, “Positive magnetic susceptibility in polygonal nanotube tori”, Physical Review B 71, 045418(2005).

55. N. Miyata, I. Matsuda, M. D'angelo, H. Morikawa, T. Hirahara, and S. Hasegawa,“STM observation of the Si(111)-c(12×2)-Ag surface”, e-Journal of Surface Science and Nanotechnology 3, 151(2005).

56. I. Matsuda, M. Ueno, T. Hirahara, R. Hobara, H. Morikawa, and S. Hasegawa, “Resistance of a monatomic step on a crystal surface”, Physical Review Letters　93, 236801(2004).

57. T. Hirahara, I. Matsuda, M. Ueno, and S. Hasegawa, “The effective mass of a free-electron-like surface state of the Si(111)√3×√3-Ag surface investigated by photoemission and scanning tunneling spectroscopies” Surface Science 563, 191 (2004).

58. T. Hirahara, I. Matsuda, and S. Hasegawa, “Photoemission Structure Factor Effect for Fermi Rings of the Si(111)√3×√3-Ag Surface”, e-Journal of Surface Science and Nanotechnology 2, 141 (2004).