Seigo Souma Ph.D.

Job Associate Professor
Group Materials Physics Group
Laboratory T. Sato Laboratory (will open in a new tab)
Address room 1A, AIMR Main Building, Katahira Campus
(2-1-1, Katahira, Aoba-ku ,Sendai 980-8577)
Tel +81-22-217-6169
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Research Interests

  • Electronic structure of novel superconductors (2001-)
  • Development of high-resolution photoemission spectrometer (2001-)
  • Development of spin-resolved photoemission spectrometer (2004-)
  • Spin-dependent electronic structure of topological insulators and surface Rashba effect (2004-)

Main Publication List

  • The origin of multiple superconducting gaps in MgB2, Nature,423,(2003),65-67, S. Souma, Y. Machida, T. Sato, T. Takahashi, H. Matsui, S.-C. Wang, H. Ding, A. Kaminski, J. C. Campuzano, S. Sasaki, and K. Kadowaki.
  • High-intensity xenon plasma discharge lamp for bulk-sensitive high-resolution photoemission spectroscopy, Rev. Sci. Instrum. 78 (2007) 123104S. Souma, T. Sato, T. Takahashia, and P. Baltzer.
  • Ultrahigh-resolution spin-resolved photoemission spectrometer with a mini Mott detector, Rev. Sci. Instrum., 81 (2010) 095101, S. Souma, A. Takayama, K. Sugawara, T. Sato, T. Takahashi.
  • Direct Measurement of the Out-of-Plane Spin Texture in the Dirac Cone Surface State of a Topological Insulator, Phys. Rev. Lett. 106 (2011) 216803, S. Souma, K. Kosaka, T. Sato, M. Komatsu, A. Takayama, T. Takahashi, M. Kriener, K. Segawa, and Y. Ando.
  • Spin Polarization of Gapped Dirac Surface States Near the Topological Phase Transition in TlBi(S1-xSex)2, Phys. Rev. Lett., 109 (2012) 186804, S. Souma, M. Komatsu, M. Nomura, T. Sato, A. Takayama, T. Takahashi, K. Eto, K. Segawa, and Y. Ando.


  • Inoue Research Award for Young Scientists (2006)
  • Harada Young Research Award (2007)
  • Young Scientist Award of the Physical Society of Japan (2012)
  • The Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology, the Young Scientists’ Prize (2013)

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