Delocalized quasiparticles throughout the vortex state in s-wave superconductor LuNi_2B_2C
Superconductivity
2007-05-23 v1
Abstract
Quasiparticle transport in the vortex state of an s-wave superconductor at T -> 0 was investigated by measuring the thermal conductivity of LuNi_2B_2C down to 70 mK in a magnetic field perpendicular to the heat current. In zero field, there is no electronic conduction, as expected for a superconducting gap without nodes. However, as soon as vortices enter the sample quasiparticles are seen to conduct remarkably well, even better than they would in a typical d-wave superconductor. This is in stark conflict with the widely held view that quasiparticle states in s-wave superconductors just above H_{c1} should be localized and bound to the vortex core.
Cite
@article{arxiv.cond-mat/0012436,
title = {Delocalized quasiparticles throughout the vortex state in s-wave superconductor LuNi_2B_2C},
author = {Etienne Boaknin and R. W. Hill and Cyril Proust and C. Lupien and Louis Taillefer and P. C. Canfield},
journal= {arXiv preprint arXiv:cond-mat/0012436},
year = {2007}
}
Comments
5 pages, 3 figures