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Intrinsic Rashba-like splitting in asymmetric Bi2Te3/Sb2Te3 heterogeneous topological insulator films.
- Source :
-
Applied Physics Letters . 8/25/2014, Vol. 105 Issue 8, p1-5. 5p. 1 Diagram, 1 Chart, 4 Graphs. - Publication Year :
- 2014
-
Abstract
- We show by density functional theory calculations that asymmetric hetero-stacking of Bi2Te3/Sb2Te3 films can modulate the topological surface states. Due to the structure inversion asymmetry, an intrinsic Rashba-like splitting of the conical surface bands is aroused. While such splitting in homogeneous Bi2Te3-class topological insulators can be realized in films with more than three quintuple layers under external electric fields, the hetero-stacking breaks the limit of thickness for preserving the topological nature into the thinnest two quintuple layers. These results indicate that the hetero-stacking can serve as an efficient strategy for spin-resolved band engineering of topological insulators. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 105
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 97881282
- Full Text :
- https://doi.org/10.1063/1.4893987