One-dimensional Dirac electrons on the surface of weak topological insulators
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Contributors
Abstract
We show that a class of weak three-dimensional topological insulators feature one-dimensional Dirac electrons on their surfaces. Their hallmark is a linelike energy dispersion along certain directions of the surface Brillouin zone. These one-dimensional Dirac line degeneracies are topologically protected by a symmetry that we refer to as in-plane time-reversal invariance. We show how this invariance leads to Dirac lines in the surface spectrum of stacked Kane-Mele systems and more general models for weak three-dimensional topological insulators.
Details
Original language | English |
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Article number | 085106 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 91 |
Issue number | 8 |
Publication status | Published - 11 Feb 2015 |
Peer-reviewed | Yes |