Journal
AIP ADVANCES
Volume 6, Issue 9, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4962662
Keywords
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Funding
- Fundamental Research Funds for the Central Universities
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- NSFC [11204123]
- State Key Program for Basic Research of China [2015CB659300]
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Monolayer WTe2, which is predicted to be large-gap quantum spin Hall (QSH) insulators with distorted 1T (1T') structure, attracts rapidly growing interests. However, the intrinsic semimetallic nature of the monolayer 1T'-WTe2 limits their direct applications based on QSH effect. By first-principles density functional theoretical calculations, we demonstrate a phase transition from semimetal to QSH insulator under the uniaxial strains along a and b axis in monolayer 1T'-WTe2. The electronic phase transition results from the geometric structure deformation upon the uniaxial strains. This suggests monolayer 1T'-WTe2 as a promising material for application in strain-tunable topological quantum electronics. (C) 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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