1212.1101 (A. D. K. Finck et al.)

Anomalous modulation of a zero bias peak in a hybrid
nanowire-superconductor device    [PDF]

A. D. K. Finck, D. J. Van Harlingen, P. K. Mohseni, K. Jung, X. Li

We report on sub-gap transport measurements of an InAs nanowire coupled to niobium nitride leads at high magnetic fields. We observe a zero-bias anomaly (ZBA) in the differential conductance of the nanowire for certain ranges of magnetic field and chemical potential. The ZBA can oscillate in width with either magnetic field or chemical potential; it can even split and reform. We interpret this behavior as being consistent with Majorana fermions in the nanowire hybridizing with each other, leading to a quasi-periodic splitting in the ZBA.

View original: http://arxiv.org/abs/1212.1101