Upper critical field in a trigonal unconventional superconductor UPt_3
Superconductivity
2009-11-07 v3
Abstract
A theory of the upper critical field in a trigonal superconductor with a two-component order-parameter is developed. We demonstrate the existence of sixfold modulations of the upper critical field in the basal plane. The form of the angular dependence of H_c2 in the plane of the main symmetry axis is studied in the whole range of phenomenological rigidity coefficients. A qualitative dependence of these coefficients on the form of the Fermi surface is established. The results obtained are discussed in connection with the measurements of the direction dependence of H_c2 in the heavy fermion superconductor UPt_3 that has been recently found to possess trigonal crystalline structure. PACS numbers: 74.20.De, 74.70.Tx
Cite
@article{arxiv.cond-mat/0111457,
title = {Upper critical field in a trigonal unconventional superconductor UPt_3},
author = {P. L. Krotkov and V. P. Mineev},
journal= {arXiv preprint arXiv:cond-mat/0111457},
year = {2009}
}
Comments
8 pages, 5 figures