Spin Chirality Tuning and Topological Semimetals in Strained HgTe(x)S(1-x).
Phys Rev Lett
; 114(23): 236805, 2015 Jun 12.
Article
em En
| MEDLINE
| ID: mdl-26196822
ABSTRACT
By means of detailed electronic structure calculations, we show that strained HgTe(x)S(1-x) alloys show a surprisingly rich topological phase diagram. In the strong topological insulator phase, the spin chirality of the topological nontrivial surface states can be reversed by adjusting the alloy concentration x and the strain. On top of this, we predict two semimetallic topological phases, namely, a Dirac semimetal and a Weyl semimetal. The topological phases are characterized by their Z2 invariants and their mirror Chern numbers.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article