The wall energy and the critical current of an anisotropic high-temperature superconductor using modified Ginzburg-Landau theory

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Journal of Low Temperature Physics; (USA)

DOI:https://doi.org/10.1007/BF00682107· OSTI ID:6543395

Shehata, L N ^[1]

---

1. International Centre for Theoretical Physics, Trieste (Italy)

The modified Ginzburg-Landau theory (MGL) for strongly anisotropic high-temperature superconductors (HTS's) is reviewed, and the MGL equations are rederived and used in solving two important fundamental problems. The first one concerns the evaluation of the domain-wall energy problem by a complete solution of the derived equations. The modified free energy functional is used to calculate the maximum supercurrents in both HTS's and the conventional superconductors. Our calculations show that the surface energy vanishes at the critical value of the GL parameter {kappa}{sub c} = (1/{radical}2)((1{minus}M)(1+(M/3))){sup 1/2}, where 0{le}M<1. Therefore, the transformation from type II to type I superconductivity is possible at temperatures very close to the transition critical one, at which {kappa}(T) becomes zero.

• OSTI ID: 6543395
• Journal Information: Journal of Low Temperature Physics; (USA), Journal Name: Journal of Low Temperature Physics; (USA) Vol. 78:1-2; 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
CRITICAL CURRENT
CURRENTS
DATA ANALYSIS
DOCUMENT TYPES
ELECTRIC CURRENTS
GINZBURG-LANDAU THEORY
MATHEMATICAL MODELS
REVIEWS
SUPERCONDUCTORS