Functional derivative of T/sub c/ with. cap alpha. /sup 2/(. omega. )F(. omega. ) for weak coupling anisotropic superconductors

Journal Article · Sun Jul 01 00:00:00 EDT 1984 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00681458· OSTI ID:6792481

Whitmore, M D

Approximate analytic calculations of the functional derivative of T/sub c/ with respect to ..cap alpha../sup 2/(..omega..)F(..omega..) for anisotropic superconductors are presented, with the primary purpose of identifying the determining material parameters. The ''square-well model'' for the phonon-mediated electron-electron interaction, the weak coupling limit (..omega../sub c//2..pi..T/sub c/>>1), an separable anisotropy are used. The general behavior of deltaT/sub c//delta..cap alpha../sup 2/(..omega..)F(..omega..) is the same as that found in numerical calculations for the case of small anisotropy, /(lambda-..mu..*)<<1; the regime of ..mu..*approx. =lambda is also discussed.

• Research Organization: Department of Physics, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
• OSTI ID: 6792481
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 56:1; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
ELECTRON-ELECTRON COUPLING
FUNCTIONAL ANALYSIS
GORKOV-ELIASHBERG THEORY
MATERIALS
MATHEMATICAL MODELS
MATHEMATICS
NUCLEAR MODELS
NUCLEAR POTENTIAL
PHONONS
PHYSICAL PROPERTIES
POTENTIALS
QUASI PARTICLES
SQUARE-WELL POTENTIAL
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
WEAK-COUPLING MODEL