Quantum spin Hall insulator with a large bandgap, Dirac fermions, and bilayer graphene analog.
Sci Adv
; 4(4): eaap7529, 2018 04.
Article
em En
| MEDLINE
| ID: mdl-29725617
ABSTRACT
The search for room temperature quantum spin Hall insulators (QSHIs) based on widely available materials and a controlled manufacturing process is one of the major challenges of today's topological physics. We propose a new class of semiconductor systems based on multilayer broken-gap quantum wells, in which the QSHI gap reaches 60 meV and remains insensitive to temperature. Depending on their layer thicknesses and geometry, these novel structures also host a graphene-like phase and a bilayer graphene analog. Our theoretical results significantly extend the application potential of topological materials based on III-V semiconductors.
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MEDLINE
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En
Ano de publicação:
2018
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Article