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Giant Topological Nontrivial Band Gaps in ChloridizedGallium Bismuthide.
- Source :
-
Nano Letters . Feb2015, Vol. 15 Issue 2, p1296-1301. 6p. - Publication Year :
- 2015
-
Abstract
- Quantumspin Hall (QSH) effect is promising for achieving dissipationlesstransport devices but presently is achieved only at extremely lowtemperature. Searching for the large-gap QSH insulators with strongspin–orbit coupling (SOC) is the key to increase the operatingtemperature. We demonstrate theoretically that this can be solvedin the chloridized gallium bismuthide (GaBiCl2) monolayer,which has nontrivial gaps of 0.95 eV at the Γ point, and 0.65eV for bulk, as well as gapless edge states in the nanoribbon structures.The nontrivial gaps due to the band inversion and SOC are robust againstexternal strain. The realization of the GaBiCl2monolayerwill be beneficial for achieving QSH effect and related applicationsat high temperatures. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15306984
- Volume :
- 15
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Nano Letters
- Publication Type :
- Academic Journal
- Accession number :
- 101003180
- Full Text :
- https://doi.org/10.1021/nl504493d