Quantum transport in two dimensional electron gas/p-wave superconductor junction with Rashba spin-orbit coupling at the interface and in the normal layer

摘要

We have studied the tunneling conductance of a clean two dimensional electron gas/p- wave superconductor junction with Rashba spin-orbit coupling (RSOC) which is present in the normal layer and at the interface. Using the extended Blonder-Tinkham-KIapwijk formalism we have found that the subgap conductance peaks are shifted to a nonzero bias by RSOC at the interface which are the same as Ref. [1]. It is shown that for low insulating barrier and in the absence of the interface RSOC, the tunneling conductance decreases within energy gap with increasing of the RSOC in the normal layer while for high insulating barrier it enhances by increase of the RSOC. We have also shown that the RSOC inside the normal cannot affect the location of the subgap conductance peaks shifted by the interface RSOC.