title: Experimental evidence of hidden topological surface states in PbBi4Te7.
abstract: A topological surface state that is protected physically under the Bi2Te3-like five-layer block has been revealed on the Pb-based topological insulator (TI) PbBi4Te7 by bulk sensitive angle-resolved photoelectron spectroscopy (ARPES). Furthermore, conservation of the spin polarization of the hidden topological surface states is directly confirmed by bulk-sensitive spin ARPES observation. This finding paves the way to realize the real spintronics devices by TIs that are operable in the real environment.
authors.affiliation: Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan.
authors.forename: Taichi
authors.initials: T
authors.lastname: Okuda
authors.forename: Takamasa
authors.initials: T
authors.lastname: Maegawa
authors.forename: Mao
authors.initials: M
authors.lastname: Ye
authors.forename: Kaito
authors.initials: K
authors.lastname: Shirai
authors.forename: Takuya
authors.initials: T
authors.lastname: Warashina
authors.forename: Koji
authors.initials: K
authors.lastname: Miyamoto
authors.forename: Kenta
authors.initials: K
authors.lastname: Kuroda
authors.forename: Masashi
authors.initials: M
authors.lastname: Arita
authors.forename: Ziya S
authors.initials: ZS
authors.lastname: Aliev
authors.forename: Imamaddin R
authors.initials: IR
authors.lastname: Amiraslanov
authors.forename: Mahammad B
authors.initials: MB
authors.lastname: Babanly
authors.forename: Evgueni V
authors.initials: EV
authors.lastname: Chulkov
authors.forename: Sergey V
authors.initials: SV
authors.lastname: Eremeev
authors.forename: Akio
authors.initials: A
authors.lastname: Kimura
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Namatame
authors.forename: Masaki
authors.initials: M
authors.lastname: Taniguchi