Please use this identifier to cite or link to this item:
Title: Evolution of topological surface states in antimony ultra-thin films
Authors: Yao, G.
Luo, Z.
Pan, F.
Xu, W.
Feng, Y.P. 
Wang, X.-S. 
Issue Date: 2013
Citation: Yao, G., Luo, Z., Pan, F., Xu, W., Feng, Y.P., Wang, X.-S. (2013). Evolution of topological surface states in antimony ultra-thin films. Scientific Reports 3 : -. ScholarBank@NUS Repository.
Abstract: Based on an inverted bulk band order, antimony thin films presumably could become topological insulators if quantum confinement effect opens up a gap in the bulk bands. Coupling between topological surface states (TSS) from opposite surfaces, however, tends to degrade or even destroy their novel characters. Here the evolution and coupling of TSS on Sb(111) thin films from 30 bilayers down to 4 bilayers was investigated using in-situ Fourier-transform scanning tunneling spectroscopy and density functional theory computations. On a 30-bilayer sample, quasi-particle interference patterns are generated by the scattering of TSS from the top surface only. As the thickness decreases, inter-surface coupling degrades spin polarisation of TSS and opens up new wavevector-dependent scattering channels, resulting in spin degenerate states in most part of the surface Brillouin zone, whereas the TSS near the zone centre exhibit little inter-surface coupling, so they remain spin-polarised without opening a gap at the Dirac point.
Source Title: Scientific Reports
ISSN: 20452322
DOI: 10.1038/srep02010
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Oct 19, 2021


checked on Oct 19, 2021

Page view(s)

checked on Oct 14, 2021

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.