Scanning tunneling spectroscopy and surface quasiparticle interference in models for the strongly correlated topological insulators SmB6 and PuB6

Abstract

SmB6 is one of the candidate compounds for topological Kondo insulators, a class of materials which combines a non-trivial topological band structure with strong electronic correlations. Here we employ a multiband tight-binding description, supplemented by a slave-particle approach to account for strong interactions, to theoretically study the surface-state signatures in scanning tunneling spectroscopy (STS) and quasiparticle interference (QPI). We discuss the spin structure of the three surface Dirac cones of SmB6 and provide concrete predictions for the energy and momentum dependence of the resulting QPI signal. Our results also apply to PuB6, a strongly correlated topological insulator with a very similar electronic structure.

5+8 pages, 4+5 figs, (v2) minor modifications, final version as published

References in corpus (9)

• Topological Insulators with Inversion Symmetry
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Topological Surface States Protected From Backscattering by Chiral Spin Texture
• Correlated Topological Insulators with Mixed Valence
• Direct observation of the spin texture in strongly correlated SmB6 as evidence of the topological Kondo insulator
• Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB6
• Electron Cotunneling into a Kondo Lattice
• Stationary phase approximation approach to the quasiparticle interference on the surface of a strong topological insulator
• Kondo holes in topological Kondo insulators: Spectral properties and surface quasiparticle interference

Cited by in corpus (1)

• Model Hamiltonian for topological Kondo insulator SmB6