Theory of the generalized Ginzburg-Landau parameter. kappa. sub 2 for strong-coupling superconductors at arbitrary impurity concentration

Journal Article · Tue Oct 31 23:00:00 EST 1989 · Journal of Low Temperature Physics; (USA)

DOI:https://doi.org/10.1007/BF00681534· OSTI ID:6899757

Rammer, J; Pesch, W ^[1]

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1. Physikalisches Institut der Universitat Bayreuth (West Germany)

We study strong-coupling effects on the slope of the magnetization curve at the upper critical field of a type II superconductor, parametrized by the generalized Ginzburg-Landau parameter {kappa}{sub 2}. The use of the quasiclassical approach to the BCS-Gorkov theory, valid for all temperatures, allows us to present the calculations in a transparent manner. We obtain closed expressions for {kappa}{sub 2} in terms of the solution of the eigenvalue problem determining the upper critical field, which we evaluate numerically. In the weak-coupling limit, previous results are reproduced, apart from a small correction.

• OSTI ID: 6899757
• Journal Information: Journal of Low Temperature Physics; (USA), Journal Name: Journal of Low Temperature Physics; (USA) Vol. 77:3-4; ISSN 0022-2291; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALCULATION METHODS
GINZBURG-LANDAU THEORY
IMPURITIES
MAGNETIZATION
MATHEMATICAL MODELS
PARTICLE MODELS
STRONG-COUPLING MODEL
SUPERCONDUCTORS
TYPE-II SUPERCONDUCTORS