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Density of states in d-wave superconductors disordered by extended impurities

Inanc Adagideli·Daniel E. Sheehy·Paul M. Goldbart
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Abstract

The low-energy quasiparticle states of a disordered d-wave superconductor are investigated theoretically. A class of such states, formed via tunneling between the Andreev bound states that are localized around extended impurities (and result from scattering between pair-potential lobes that differ in sign) is identified. Its (divergent) contribution to the total density of states is determined by taking advantage of connections with certain one-dimensional random tight-binding models. The states under discussion should be distinguished from those associated with nodes in the pair potential.

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Inanc Adagideli, Daniel E. Sheehy, Paul M. Goldbart. 2002-11-06. Density of states in d-wave superconductors disordered by extended impurities. https://doi.org/10.1103/physrevb.66.140512

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