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Tunable topological electronic structures in Sb(111) bilayers: A first-principles study.
- Source :
-
Applied Physics Letters . 1/14/2013, Vol. 102 Issue 2, p022424-022424-4. 1p. 4 Graphs. - Publication Year :
- 2013
-
Abstract
- Electronic structures and band topology of a single Sb(111) bilayer in the buckled honeycomb configuration are investigated using first-principles calculations. A nontrivial topological insulating phase can be induced by tensile strain, indicating the possibility of realizing the quantum spin Hall state for Sb thin films on suitable substrates. The presence of buckling provides an advantage in controlling the band gap through an out-of-plane external electric field, making a topological phase transition with six spin-polarized Dirac cones at the critical point. With a tunable gap and reversible spin polarization, Sb thin films are promising candidates for spintronic applications. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ELECTRONIC structure
*TOPOLOGY
*HONEYCOMB structures
*STRAIN energy
*TUNABLE lasers
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 102
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 84985477
- Full Text :
- https://doi.org/10.1063/1.4776734