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

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

2002-01-18

arxiv.org/abs/cond-mat/0201339v2

Phys. Rev. B 66, 140512 (2002)

Physics

Condensed Matter

Superconductivity

5 pages, 1 figure

Scientific paper

10.1103/PhysRevB.66.140512

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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