Quasiparticle Delocalization Induced by Novel Quantum Interference in Disordered d-Wave Superconductors
Superconductivity
2009-11-07 v1 Disordered Systems and Neural Networks
Abstract
The diagrammatic approach is applied to study quasiparticle transport properties in two-dimensional d-wave superconductors with dilute nonmagnetic impurities both in Born and in unitary limits. It is found that a novel quantum interference process gives rise to a weak-antilocalization correction to the spin conductivity, indicating the existence of extended low-energy quasiparticle states. With comimg close to unitarity and the nesting, this correction is suppressed and eventually vanishes due to the global particle-hole symmetry.
Cite
@article{arxiv.cond-mat/0211078,
title = {Quasiparticle Delocalization Induced by Novel Quantum Interference in Disordered d-Wave Superconductors},
author = {Y. H. Yang and D. Y. Xing and M. Liu and Y. G. Wang},
journal= {arXiv preprint arXiv:cond-mat/0211078},
year = {2009}
}
Comments
8 pages, 2 figures