Journal
APPLIED PHYSICS LETTERS
Volume 95, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3268475
Keywords
cadmium compounds; electric field effects; II-VI semiconductors; mercury compounds; phase diagrams; semiconductor quantum wells; solid-state phase transformations
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Funding
- NSFC [60525405, 10874175]
- National Basic Research Program of China (973 Program) [2010CB933700]
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We demonstrate theoretically that electric field can drive a quantum phase transition between band insulator to topological insulator in CdTe/HgCdTe/CdTe quantum wells. The numerical results suggest that the electric field could be used as a switch to turn on or off the topological insulator phase, and temperature can affect significantly the phase diagram for different gate voltage and compositions. Our theoretical results provide us an efficient way to manipulate the quantum phase of HgTe quantum wells.
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