Peculiar Rashba Splitting Originating from the Two-Dimensional Symmetry of the Surface

Kazuyuki Sakamoto, Haruya Kakuta, Katsuaki Sugawara, Koji Miyamoto, Akio Kimura, Takuya Kuzumaki, Nobuo Ueno, Emilia Annese, Jun Fujii, Ayaka Kodama, Tatsuya Shishidou, Hirofumi Namatame, Masaki Taniguchi, Takafumi Sato, Takashi Takahashi, Tamio Oguchi

Research output: Contribution to journalArticlepeer-review

121 Citations (Scopus)


A peculiar Rashba effect is found at a point in the Brillouin zone, where the time-reversal symmetry is broken, though this symmetry was believed to be a necessary condition for Rashba splitting. This finding obtained experimentally by photoemission measurements on a Bi/Si(111)-(3×3) surface is fully confirmed by a first-principles theoretical calculation. We found that the peculiar Rashba effect is simply understood by the two-dimensional symmetry of the surface, and that this effect leads to an unconventional nonvortical Rashba spin structure at a point with time-reversal invariance.

Original languageEnglish
Article number156801
JournalPhysical Review Letters
Issue number15
Publication statusPublished - 2009 Oct 5


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