Quasiparticle density of states in superconducting alloys with localized states within the gap

Journal Article · Sun Jan 01 04:00:00 EST 1984 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.29.165· OSTI ID:5168921

Schachinger, E; Carbotte, J P

We present results of real-frequency-axis strong-coupling calculations for the quasiparticle density of states of superconducting alloys with localized states within the energy gap. These states arise from spin-flip scattering by paramagnetic impurities treated within the T-matrix approach of Rusinov and Shiba. Comparison of our results with previous imaginary-frequency-axis Eliashberg calculation and with the results of BCS-theory calculations reveals differences in the predicted structures within and near the main gap edge. It is also found that the quasiparticle density of states in the phonon energy range is strongly affected by the impurities.

• Research Organization: Institut fuer Theoretische Physik der Technischen Universitat Graz, A-8010 Graz, Austria
• OSTI ID: 5168921
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 29:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
BCS THEORY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY GAP
ENERGY-LEVEL DENSITY
GORKOV-ELIASHBERG THEORY
MATHEMATICAL MODELS
PARTICLE MODELS
PHYSICAL PROPERTIES
QUASI PARTICLES
STRONG-COUPLING MODEL
SUPERCONDUCTIVITY
SUPERCONDUCTORS