Abstract
One of the simplest proposed experimental probes of a Majorana bound-state is a quantized (2e2/h) value of zero-bias tunneling conductance. When temperature is somewhat larger than the intrinsic width of the Majorana peak, conductance is no longer quantized, but a zero-bias peak can remain. In recently, a series of experiment have reported the non-quantized zero-bias peaks in semiconducting nanowires with proximity induced superconductivity. A lot of people has been attracted by the sign of putative Majorana Fermions (MF) and try to verify whether it is a true MF. In this talk I will give an analysis of the relation of the zero-bias peak in the presence of Majorana end-states, I will show that this system generically exhibits a (non-quantized) zero-bias peak even when the wire is topologically trivial and does not possess Majorana end-states. At last I will discuss the necessary requirements for confirming the existence of a Majorana state.
Coffee and tea will be served 20 minutes prior to the seminar.