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

References in corpus (5)

• Proximity-induced high-temperature superconductivity in topological insulators Bi2Se3 and Bi2Te3
• Topological properties of spin-triplet superconductors and the Fermi surface topology in the normal state
• Andreev bound states and tunneling characteristics of a non-centrosymmetric superconductor
• Surface spectral function in the superconducting state of a topological insulator
• Zero energy bound states in tunneling conductance spectra at the interface of an s-wave superconductor and a topological insulator in NbN-$B{i}_{2}S{e}_3$-Au thin film junctions

Cited by in corpus (2)

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