Berry phase in Magnetic Superconductors
Superconductivity
2009-11-07 v2 Mesoscale and Nanoscale Physics
Abstract
In magnetic systems, electronic bands often acquire nontrivial topological structure characterized by gauge flux distribution in momentum (k)-space. It sometimes follows that the phase of the wavefunctions cannot be defined uniquely over the whole Brillouin zone. In this Letter we develop a theory of superconductivity in the presence of this gauge flux both in two- and three-dimensional systems. It is found that the superconducting gap has "nodes" as a function of k where the Fermi surface is penetrated by a gauge string.
Cite
@article{arxiv.cond-mat/0209001,
title = {Berry phase in Magnetic Superconductors},
author = {Shuichi Murakami and Naoto Nagaosa},
journal= {arXiv preprint arXiv:cond-mat/0209001},
year = {2009}
}
Comments
4 pages, 3 figures, substantial changes in the presentation, to be published in Phys. Rev. Lett