title: Peculiar Rashba splitting originating from the two-dimensional symmetry of the surface.
abstract: 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)-(sqrt(3) x sqrt(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.
authors.affiliation: Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan. kazuyuki_sakamoto@faculty.chiba-u.jp
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Sakamoto
authors.forename: Haruya
authors.initials: H
authors.lastname: Kakuta
authors.forename: Katsuaki
authors.initials: K
authors.lastname: Sugawara
authors.forename: Koji
authors.initials: K
authors.lastname: Miyamoto
authors.forename: Akio
authors.initials: A
authors.lastname: Kimura
authors.forename: Takuya
authors.initials: T
authors.lastname: Kuzumaki
authors.forename: Nobuo
authors.initials: N
authors.lastname: Ueno
authors.forename: Emilia
authors.initials: E
authors.lastname: Annese
authors.forename: Jun
authors.initials: J
authors.lastname: Fujii
authors.forename: Ayaka
authors.initials: A
authors.lastname: Kodama
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Shishidou
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Namatame
authors.forename: Masaki
authors.initials: M
authors.lastname: Taniguchi
authors.forename: Takafumi
authors.initials: T
authors.lastname: Sato
authors.forename: Takashi
authors.initials: T
authors.lastname: Takahashi
authors.forename: Tamio
authors.initials: T
authors.lastname: Oguchi