Surface reconstruction in a tight-binding model for the topological Kondo insulator SmB6

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Abstract

For the strongly correlated topological insulator SmB6 we discuss the influence of a 2×1 reconstruction of the (001) surface on the topological surface states. Depending on microscopic details, the reconstruction can be a weak or a strong perturbation to the electronic states. While the former leads to a weak backfolding of the surface bands only, the latter can modify the surface-state dispersion and lead to a Lifshitz transition.Weanalyze the quasiparticle interference signal: while this tends to be weak in models for SmB6 in the absence of surface reconstruction, we find that the 2×1 reconstruction can induce novel peaks.Wediscuss experimental implications.

Details

Original languageEnglish
Article number044011
Journal2D materials
Volume2
Issue number4
Publication statusPublished - 23 Nov 2015
Peer-reviewedYes

Keywords

Keywords

  • Quasiparticle interference, Samarium hexaboride, Surface states

Library keywords