Gap anisotropy in superconductors with paramagnetic impurities

Journal Article · Thu Jan 01 04:00:00 EST 1981 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00116696· OSTI ID:6799625

Daams, J M; Schachinger, E; Carbotte, J P

The effect of magnetic impurities with localized moments on the anisotropy in the gap and, hence, of the critical temperature is studied by numerical solution of the Eliashberg equations with a simple model for the anistropy in the interaction. Quantitative results are given for lead for the transition temperature as a function of normal and spin-flip lifetimes. A significantly higher critical concentration of spin-flip scatterers is needed to suppress superconductivity in the anisotropic system than in the isotropic one with the same mean electron-phonon interaction; for concentrations between that critical for the anisotropic and that critical for the isotropic system superconductivity persists because the anisotropy is found to have increased above that in the pure material. This anisotropy increase is studied in detail.

• Research Organization: Physics Department, McMaster University, Hamilton, Ontario, Canada
• OSTI ID: 6799625
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 42:1; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656101 -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
ELEMENTS
ENERGY GAP
GORKOV-ELIASHBERG THEORY
IMPURITIES
LEAD
LIFETIME
METALS
NUMERICAL SOLUTION
PHYSICAL PROPERTIES
SPIN FLIP
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE