Format

Send to

Choose Destination
Phys Rev Lett. 2012 Nov 30;109(22):227401. Epub 2012 Nov 30.

Atomic and electronic structure of ultrathin Bi(111) films grown on Bi2Te3(111) substrates: evidence for a strain-induced topological phase transition.

Author information

1
Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. hirahara@surface.phys.s.u-tokyo.ac.jp

Erratum in

  • Phys Rev Lett. 2013 Apr 5;110(14):149901.

Abstract

We studied the atomic and electronic structures of ultrathin Bi(111) films grown on Bi(2)Te(3) by means of angle-resolved photoemission, first-principles calculations, and low-energy electron diffraction. These Bi films were found to be strained due to the influence of the substrate. Accordingly, the band structure is affected and Bi undergoes a topological phase transition; it is shown that the Z(2) topological invariant in three dimensions switches from +1 (trivial) to -1 (nontrivial or topological). This was clearly confirmed from the change in the surface-state dispersion near the Fermi level. Our discovery offers a method to produce novel topological systems from simple materials.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center