Ab initio study of topological surface states of strained HgTe

Wu SC, Yan B, Felser C (2014)

Publication Type: Journal article

Publication year: 2014

Journal

EPL - Europhysics Letters Institute of Physics: EPL

Book Volume: 107

Article Number: 57006

Journal Issue: 5

DOI: 10.1209/0295-5075/107/57006

Abstract

The topological surface states of mercury telluride (HgTe) are studied by ab initio calculations assuming different strains and surface terminations. For the Te-terminated surface, a single Dirac cone exists at the Γ-point. The Dirac point shifts up from the bulk valence bands into the energy gap when the substrate-induced strain increases. At the experimental strain value (0.3%), the Dirac point lies slightly below the bulk valence band maximum. A left-handed spin texture was observed in the upper Dirac cone, similar to that of the Bi2Se3-type topological insulator. For the Hg-terminated surface, three Dirac cones appear at three time-reversal-invariant momenta, excluding the Γ-point, with non-trivial spin textures.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Wu, S.-C., Yan, B., & Felser, C. (2014). Ab initio study of topological surface states of strained HgTe. EPL - Europhysics Letters, 107(5). https://doi.org/10.1209/0295-5075/107/57006

MLA:

Wu, Shu-Chun, Binghai Yan, and Claudia Felser. "Ab initio study of topological surface states of strained HgTe." EPL - Europhysics Letters 107.5 (2014).

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