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Electric field manipulation of surface states in topological semimetals

AuthorsBaba, Y.; Díaz-Fernández, A.; Domínguez-Adame, F.; Molina, Rafael A.
Issue Date3-Oct-2019
PublisherAmerican Physical Society
CitationPhysical Review B 100: 165105 (2019)
AbstractWe investigate the consequences of applying electric fields perpendicularly to thin films of topological semimetals. In particular, we consider Weyl and Dirac semimetals in a configuration such that their surface Fermi arcs lie on opposite edges of the films. We develop an analytical approach based on perturbation theory and a single-surface approximation and we compare our analytical results with numerical calculations. The effect of the electric field on the dispersion is twofold: It shifts the dispersion relation and renormalizes the Fermi velocity, which would, in turn, have direct effects on quantum transport measurements. Additionally, it modifies the spatial decay properties of surface states which will impact the connection of the Fermi arcs in opposite sides of a narrow thin film.
Description9 pags., 10 figs
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.100.165105
Identifiersdoi: 10.1103/PhysRevB.100.165105
issn: 2469-9950
Appears in Collections:(CFMAC-IEM) Artículos
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