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Symmetry breaking in the tunnelling conductance of a superconducting vortex

Leadbeater, M and Lambert, Colin (1996) Symmetry breaking in the tunnelling conductance of a superconducting vortex. Journal of Physics: Condensed Matter, 8 (24). L345-L352. ISSN 0953-8984

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Abstract

Recent STM experiments on c-axis tunnelling into a vortex core of YBCO have yielded a sub-gap differential conductance which is not invariant under a reversal of the applied bias. By computing the differential conductance G(E) of a normal-superconducting contact to all orders in the tunnelling strength, we predict that in the absence of open channels in the superconductor, G(E) is necessarily an even function of E and that an asymmetric current-voltage characteristic implies the existence of propagating bound-states within the vortex core.

Item Type: Article
Journal or Publication Title: Journal of Physics: Condensed Matter
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 58153
Deposited By: ep_importer_pure
Deposited On: 24 Oct 2012 16:47
Refereed?: Yes
Published?: Published
Last Modified: 17 Sep 2013 08:40
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/58153

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