Topological quantum phase transition from mirror to time reversal symmetry protected topological insulator

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F17%3A00099461" target="_blank" >RIV/00216224:14310/17:00099461 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1038/s41467-017-01204-0" target="_blank" >http://dx.doi.org/10.1038/s41467-017-01204-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41467-017-01204-0" target="_blank" >10.1038/s41467-017-01204-0</a>

Result language

angličtina

Original language name

Topological quantum phase transition from mirror to time reversal symmetry protected topological insulator

Original language description

Topological insulators constitute a new phase of matter protected by symmetries. Time-reversal symmetry protects strong topological insulators of the Z(2) class, which possess an odd number of metallic surface states with dispersion of a Dirac cone. Topological crystalline insulators are merely protected by individual crystal symmetries and exist for an even number of Dirac cones. Here, we demonstrate that Bi-doping of Pb1-xSnxSe (111) epilayers induces a quantum phase transition from a topological crystalline insulator to a Z(2) topological insulator. This occurs because Bi-doping lifts the fourfold valley degeneracy and induces a gap at (Gamma) over bar, while the three Dirac cones at the (M) over bar points of the surface Brillouin zone remain intact. We interpret this new phase transition as caused by a lattice distortion. Our findings extend the topological phase diagram enormously and make strong topological insulators switchable by distortions or electric fields.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

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Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Nature Communications

ISSN

2041-1723

e-ISSN

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Volume of the periodical

8

Issue of the periodical within the volume

October

Country of publishing house

GB - UNITED KINGDOM

Number of pages

7

Pages from-to

„968-1“-„968-7“

UT code for WoS article

000413117400002

EID of the result in the Scopus database

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