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Quasiparticle Delocalization Induced by Novel Quantum Interference in Disordered d-Wave Superconductors | | Y.H. Yang
; D.Y. Xing
; M. Liu
; Y.G. Wang
; | | Date: |
5 Nov 2002 | | Subject: | Superconductivity; Disordered Systems and Neural Networks | cond-mat.supr-con cond-mat.dis-nn | | 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. | | Source: | arXiv, cond-mat/0211078 | | Services: | Forum | Review | PDF | Favorites | |
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