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Passage from spin-polarized surface states to unpolarized quantum well states in topologically nontrivial Sb films.

Authors
  • Bian, G
  • Miller, T
  • Chiang, T-C
Type
Published Article
Journal
Physical Review Letters
Publisher
American Physical Society
Publication Date
Jul 15, 2011
Volume
107
Issue
3
Pages
36802–36802
Identifiers
PMID: 21838387
Source
Medline
License
Unknown

Abstract

Topological materials have unusual surface spin properties including a net surface spin current protected by the bulk symmetry properties. When such materials are reduced to thin films, their gapless spin-polarized surface states must connect, by analytic continuation, to bulk-derived quantum-well states, which are spin-unpolarized in centrosymmetric systems. The nature of this passage in a model system, Sb films, is investigated. Angle-resolved photoemission shows a smooth transition, while calculations elucidate the correlated evolution of the spin and charge distributions in real space.

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