Helical Fermi arcs and surface states in time-reversal invariant Weyl semimetals

Teemu Ojanen
Phys. Rev. B 87, 245112 – Published 17 June 2013

Abstract

Weyl semimetals are gapless three-dimensional topological materials where two bands touch at an even number of points in the Brillouin zone. In this work we study a zinc-blende lattice model realizing a time-reversal invariant Weyl semimetal. The bulk dynamics is described by 12 helical Weyl nodes. Surface states form a peculiar quasi-two-dimensional helical metal fundamentally different from the Dirac form typical for topological insulators. The allowed direction of velocity and spin of low-energy surface excitations are locked to the cubic symmetry axes. The studied system illustrates the general properties of surface states in systems with common crystal symmetries.

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  • Received 12 April 2013

DOI:https://doi.org/10.1103/PhysRevB.87.245112

©2013 American Physical Society

Authors & Affiliations

Teemu Ojanen*

  • Low Temperature Laboratory, Aalto University, P.O. Box 15100, FI-00076 Aalto, Finland

  • *E-mail address: teemuo@boojum.hut.fi

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Vol. 87, Iss. 24 — 15 June 2013

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