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

Gad Koren, Tal Kirzhner

Measurements of conductance spectra in a superconductor - topological insulator - normal metal thin film junctions of NbN-$\mathrm{B}{\mathrm{i}}_2\mathrm{S}{\mathrm{e}}_3$-Au are reported. Junctions with ex-situ and…