title: Interfacing 2D and 3D topological insulators: Bi(111) bilayer on Bi2Te3.
abstract: We report the formation of a bilayer Bi(111) ultrathin film, which is theoretically predicted to be in a two-dimensional quantum spin Hall state, on a Bi(2)Te(3) substrate. From angle-resolved photoemission spectroscopy measurements and ab initio calculations, the electronic structure of the system can be understood as an overlap of the band dispersions of bilayer Bi and Bi(2)Te(3). Our results show that the Dirac cone is actually robust against nonmagnetic perturbations and imply a unique situation where the topologically protected one- and two-dimensional edge states are coexisting at the surface.
authors: Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo, Japan. hirahara@surface.phys.s.u-tokyo.ac.jp
authors: Toru
authors: T
authors: Hirahara
authors: Gustav
authors: G
authors: Bihlmayer
authors: Yusuke
authors: Y
authors: Sakamoto
authors: Manabu
authors: M
authors: Yamada
authors: Hidetoshi
authors: H
authors: Miyazaki
authors: Shin-ichi
authors: S
authors: Kimura
authors: Stefan
authors: S
authors: Blügel
authors: Shuji
authors: S
authors: Hasegawa