Density of states in d-wave superconductors disordered by extended impurities
arXiv:cond-mat/0201339 · doi:10.1103/PhysRevB.66.140512
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.
5 pages, 1 figure
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- Microwave conductivity of a d-wave superconductor disordered by extended impurities: a real-space renormalization group approach
- Low-energy quasiparticle excitations in dirty d-wave superconductors and the Bogoliubov-de Gennes kicked rotator
- Effects of disorder on the transmission of nodal fermions through a d-wave superconductor
- Exact summation of vertex corrections to the penetration depth in d-wave superconductors
- Birman-Schwinger and the number of Andreev states in BCS superconductors