Time-reversal symmetry breaking surface states in t-J model
Superconductivity
2009-10-31 v1 Strongly Correlated Electrons
Abstract
Recently a phenomenological Ginzburg-Landau (GL) theory has been proposed to describe the occurrence of a locally time-reversal symmetry (T) breaking state near a Josephson junction between unconventional superconductors. In this paper we derive this type of GL free energy microscopically from the t-J model within a slave-boson mean-field approximation. The resulting GL free energy is shown to satisfy the conditions to have a T-violating surface state. The existence of this junction state may explain some of the recent experiments on High-Tc superconductors.
Keywords
Cite
@article{arxiv.cond-mat/9803032,
title = {Time-reversal symmetry breaking surface states in t-J model},
author = {Kazuhiro Kuboki and Manfred Sigrist},
journal= {arXiv preprint arXiv:cond-mat/9803032},
year = {2009}
}
Comments
6 pages, 9 figures