Directly observing a zero energy Majorana state in the vortex core of a chiral superconductor by tunneling spectroscopy requires energy resolution better than the spacing between core states Δ2/eF. We show that nevertheless, its existence can be decisively tested by comparing the temperature broadened tunneling conductance of a vortex with that of an antivortex even at temperatures T>>Δ2/eF.
@article{arxiv.0811.2557,
title = {Testing for Majorana Zero Modes in a Px+iPy Superconductor at High Temperature by Tunneling Spectroscopy},
author = {Yaacov E. Kraus and Assa Auerbach and H. A. Fertig and Steven H. Simon},
journal= {arXiv preprint arXiv:0811.2557},
year = {2008}
}