2024-03-28T23:56:15Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1368402021-12-27T15:43:53Zcom_10261_115com_10261_3col_10261_368
DIGITAL.CSIC
author
Muñoz, F.
author
Vergniory, M.
author
Rauch, Tomáš
author
Henk, J.
author
Chulkov, Eugene V.
author
Mertig, I.
author
Botti, Silvana
author
Marques, Miguel A. L.
author
Romero, A. H.
funder
American Chemical Society Petroleum Research Fund
funder
German Research Foundation
funder
Ministerio de Ciencia e Innovación (España)
funder
Fondo Nacional de Desarrollo Científico y Tecnológico (Chile)
funder
Tomsk State University
funder
Ministerio de Economía y Competitividad (España)
funder
Eusko Jaurlaritza
funder
Universidad del País Vasco
funder
National Science Foundation (US)
funder
Saint Petersburg State University
2016-09-15T11:59:36Z
2016-09-15T11:59:36Z
2016
Scientific Reports 6: 21790 (2016)
http://hdl.handle.net/10261/136840
10.1038/srep21790
http://dx.doi.org/10.13039/100006770http://dx.doi.org/10.13039/501100001659http://dx.doi.org/10.13039/501100004837http://dx.doi.org/10.13039/501100002850http://dx.doi.org/10.13039/501100003329http://dx.doi.org/10.13039/100000001http://dx.doi.org/10.13039/501100004285http://dx.doi.org/10.13039/501100003086http://dx.doi.org/10.13039/501100008566
26905601
Topological crystalline insulators are a type of topological insulators whose topological surface states are protected by a crystal symmetry, thus the surface gap can be tuned by applying strain or an electric field. In this paper we predict by means of ab initio calculations a new phase of Bi which is a topological crystalline insulator characterized by a mirror Chern number nM = −2, but not a Z2 strong topological insulator. This system presents an exceptional property: at the (001) surface its Dirac cones are pinned at the surface high-symmetry points. As a consequence they are also protected by time-reversal symmetry and can survive against weak disorder even if in-plane mirror symmetry is broken at the surface. Taking advantage of this dual protection, we present a strategy to tune the band-gap based on a topological phase transition unique to this system. Since the spin-texture of these topological surface states reduces the back-scattering in carrier transport, this effective band-engineering is expected to be suitable for electronic and optoelectronic devices with reduced dissipation.
eng
openAccess
Topological crystalline insulator in a new Bi semiconducting phase
artículo
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URL
https://digital.csic.es/bitstream/10261/136840/1/Crystalline%20Insulator.pdf
File
MD5
d292c20b4ce24e4a6985ae7b3ea23dce
3002107
application/pdf
Crystalline Insulator.pdf