Anderson localization and ''universal'' degradation of T/sub c/ in high-temperature superconductors

Journal Article · Wed May 01 00:00:00 EDT 1985 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.31.6072· OSTI ID:5816287

Leavens, C R

Anderson, Muttalib, and Ramakrishnan (AMR) showed that strong disorder leads to a frequency (..omega..) dependent increase of the Coulomb repulsion in a three-dimensional superconductor. Their one-free-parameter theory agrees nicely with the experimentally observed decrease in T/sub c/ but only for a fitted critical resistivity (rho/sub c/) that is very much smaller than the free-electron-gas estimate (rho/sup f//sub c/). We reexamine the effect of AMR's disorder-enhanced Coulomb repulsion using the Eliashberg equations for T/sub c/ rather than the simple two-square-well aproximation to them which is suspect when there are more than two characteristic frequencies involved. The most important modification of the original calculation is the inclusion of the Coulomb contribution to the renormalization function Z(..omega..).

• Research Organization: Division of Microstructural Sciences, National Research Council of Canada, Ottawa, Canada K1AOR6
• OSTI ID: 5816287
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 31:9
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
SUPERCONDUCTORS
ORDER-DISORDER MODEL
TRANSITION TEMPERATURE
BETA-W LATTICES
COULOMB FIELD
ENERGY-LEVEL DENSITY
FREQUENCY DEPENDENCE
VARIATIONS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELECTRIC FIELDS
MATHEMATICAL MODELS
NUCLEAR MODELS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
656101* - Solid State Physics- Superconductivity- General Theory- (-1987)