Theory of tunneling spectroscopy in a superconducting topological insulator

Abstract

We calculate tunneling conductance of normal metal and superconducting topological insulator CuxBi2Se3 junctions for the possible pairing symmetries. In the presence of gapless Andreev bound states (ABSs), the tunneling conductance shows a zero-bias peak even for the three-dimensional full-gap superconducting state. This zero-bias conductance peak stems from the enhancement of the surface density of states induced by the surface-state transition in momentum space.

Proceeding of ISS2012

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Cited by in corpus (2)

• Superconducting Gap Structures in Wallpaper Fermion Systems
• Double-twisted surface spectrum from hybridized Majorana Kramers pairs and wallpaper fermions