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Giant Topological Nontrivial Band Gaps in ChloridizedGallium Bismuthide.

Authors :
Li, Linyang
Zhang, Xiaoming
Chen, Xin
Zhao, Mingwen
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