Superconducting T/sub c/ for the separable model of (epsilon,epsilon') variation in. cap alpha. /sup 2/F(epsilon,epsilon';. cap omega. )

Journal Article · Thu Sep 01 04:00:00 EDT 1983 · Phys. Rev. B: Condens. Matter; (United States)

OSTI ID:5465122

Mitrovic, B; Carbotte, J P

We have derived and numerically solved a set of equations for the superconducting critical temperature T/sub c/ in the case of the separable model of electronic energy dependence in the electron-phonon coupling function ..cap alpha../sup 2/F(epsilon,epsilon';..cap omega..) = (1+a(epsilon))..cap alpha../sup 2/(..cap omega..)F(..cap omega..)(1+a(epsilon')) analogous to the well-known separable model for anisotropy in ..cap alpha../sup 2/F. It is shown that to a good approximation the (epsilon,epsilon') dependence of ..cap alpha../sup 2/F can be ignored in calculating T/sub c/ provided the electronic density of states N(epsilon) is replaced by N(epsilon)(1+a(epsilon))/sup 2/. We also consider the effect of scattering by normal impurities. This scattering effectively smears out the (epsilon,epsilon') dependence of ..cap alpha../sup 2/F which is analogous to the smearing of the structure in N(epsilon) by impurity scattering.

• Research Organization: Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794
• OSTI ID: 5465122
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 28:5; 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
ELECTRON-PHONON COUPLING
ENERGY LEVELS
ENERGY-LEVEL DENSITY
GORKOV-ELIASHBERG THEORY
IMPURITIES
PHYSICAL PROPERTIES
SCATTERING
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE