1204.3085 (Chien-Hung Lin et al.)

Zero bias conductance peak in Majorana wires made of
semiconductor-superconductor hybrid structures    [PDF]

Chien-Hung Lin, Jay D. Sau, S. Das Sarma

Motivated by a recent experimental report [1] claiming the likely observation of the Majorana mode in a semiconductor-superconductor hybrid structure [2,3,4], we study theoretically the dependence of the zero bias condcutance peak associated with the zero-energy Majorana mode in the topological superconducting phase as a function of temperature, tunnel barrier potential, and a magnetic field tilted from the direction of the wire. We find that higher temperatures and tunnel barriers as well as a large magnetic field in the direction transverse to the wire length could very strongly suppress the zero-bias conductance peak as observed in Ref.[1]. We also show that a strong magnetic field along the wire could eventually lead to the splitting of the zero bias peak into a doublet.

View original: http://arxiv.org/abs/1204.3085