Density of states in unconventional superconductors: Impurity-scattering effects

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.1259· OSTI ID:7232902

Preosti, G; Kim, H; Muzikar, P ^[1]

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1. Department of Physics, Purdue University, West Lafayette, Indiana 47907 (United States)

The density of states in unconventional superconductors, [ital N][sub [ital s]]([ital E]), is very sensitive to impurity scattering, especially at low energies. We investigate the behavior of [ital N][sub [ital s]]([ital E]), using both numerical calculations and analytic approximations; we discuss the Born limit, the unitarity limit, and the crossover between these two cases. We consider a two-dimensional electron gas with a [ital d]-wave order parameter of the form [Delta]([cflx k])=[Delta]([cflx k][sub [ital x]][sup 2][minus][cflx k][sub [ital y]][sup 2]). The low-energy structure in [ital N][sub [ital s]]([ital E]) should be quite general, applying to all gaps with the same general behavior.

• OSTI ID: 7232902
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:2; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANALYTICAL SOLUTION
BORN APPROXIMATION
D WAVES
ELASTIC SCATTERING
ENERGY
ENERGY DEPENDENCE
ENERGY-LEVEL DENSITY
HIGH-TC SUPERCONDUCTORS
IMPURITIES
NUMERICAL SOLUTION
PARTIAL WAVES
SCATTERING
SELF-ENERGY
SUPERCONDUCTORS