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Quantum spin Hall insulator phase in monolayer WTe2by uniaxial strain
- Source :
- AIP Advances, Vol 6, Iss 9, Pp 095005-095005-8 (2016)
- Publication Year :
- 2016
- Publisher :
- AIP Publishing, 2016.
-
Abstract
- 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.
- Subjects :
- Quantum optics
Phase transition
Materials science
Condensed matter physics
General Physics and Astronomy
Insulator (electricity)
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
lcsh:QC1-999
Semimetal
Ab initio quantum chemistry methods
0103 physical sciences
Monolayer
Spin Hall effect
Density functional theory
010306 general physics
0210 nano-technology
lcsh:Physics
Subjects
Details
- ISSN :
- 21583226
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- AIP Advances
- Accession number :
- edsair.doi.dedup.....97a0083e199e70decf08e0c1f378db54