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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
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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.

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Y. H. Yang, D. Y. Xing, M. Liu, Y. G. Wang. 2002-11-05. Quasiparticle Delocalization Induced by Novel Quantum Interference in Disordered d-Wave Superconductors. https://doi.org/10.1209/epl%2Fi2003-00485-9

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