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Delocalized quasiparticles throughout the vortex state in s-wave superconductor LuNi_2B_2C | | Etienne Boaknin
; R. W. Hill
; Cyril Proust
; C. Lupien
; Louis Taillefer
; P. C. Canfield
; | | Date: |
22 Dec 2000 | | Subject: | Superconductivity | cond-mat.supr-con | | Affiliation: | Canadian Institute for Advanced Research and U. of Toronto), P. C. Canfield (Ames Laboratory and Department of Physics and Astronomy, Iowa State University | | 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. | | Source: | arXiv, cond-mat/0012436 | | Services: | Forum | Review | PDF | Favorites | |
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