Instabilities at [110] Surfaces of d_{x^2-y^2} Superconductors
Superconductivity
2009-10-31 v1 Strongly Correlated Electrons
Abstract
We compare different scenarios for the low temperature splitting of the zero-energy peak in the local density of states at (110) surfaces of d_{x^2-y^2}-wave superconductors, observed by Covington et al. (Phys.Rev.Lett.79 (1997), 277). Using a tight binding model in the Bogolyubov-de Gennes treatment we find a surface phase transition towards a time-reversal symmetry breaking surface state carrying spontaneous currents and an s+id-wave state. Alternatively, we show that electron correlation leads to a surface phase transition towards a magnetic state corresponding to a local spin density wave state.
Keywords
Cite
@article{arxiv.cond-mat/9902026,
title = {Instabilities at [110] Surfaces of d_{x^2-y^2} Superconductors},
author = {Carsten Honerkamp and Katsunori Wakabayashi and Manfred Sigrist},
journal= {arXiv preprint arXiv:cond-mat/9902026},
year = {2009}
}
Comments
4 pages, 5 figures