Ginzburg-Landau theory of the upper critical field in filamentary superconductors
Journal Article
·
· Phys. Rev., Sect. B. Condens. Matter; (United States)
The upper critical field for coupled filamentary superconductors is analyzed within the context of a Ginzburg-Landau theory similar to the Lawrence-Doniach theory for coupled layered superconductors. Upward curvature in the critical field as the temperature is lowered results from the decreased coupling of the filaments, and an ultimate divergence in the critical field at all angles occurs below a decoupling temperature T*. Unusual anomalies are predicted to occur in the H/sub c/2parallel(T) curve, corresponding to a commensurate fitting of the vortices into the filament lattice. The behavior of H/sub c2/ for coupled filaments is contrasted with that of an isolated fibre of finite diameter. The model is applied to (SN)/sub x/, to the transition-metal trichalcogenides NbSe/sub 3/ and TaSe/sub 3/, and to mercury embedded in asbestos.
- Research Organization:
- Department of Physics, Stanford University, Stanford, California 94305
- OSTI ID:
- 6307308
- Journal Information:
- Phys. Rev., Sect. B. Condens. Matter; (United States), Journal Name: Phys. Rev., Sect. B. Condens. Matter; (United States) Vol. 19:5; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ASBESTOS
CHALCOGENIDES
CRITICAL FIELD
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
GINZBURG-LANDAU THEORY
MAGNETIC FIELDS
MERCURY
METALS
NIOBIUM COMPOUNDS
NIOBIUM SELENIDES
NITRIDES
NITROGEN COMPOUNDS
ONE-DIMENSIONAL CALCULATIONS
PHYSICAL PROPERTIES
PNICTIDES
SELENIDES
SELENIUM COMPOUNDS
SULFUR COMPOUNDS
SULFUR NITRIDES
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
TANTALUM COMPOUNDS
TANTALUM SELENIDES
TRANSITION ELEMENT COMPOUNDS
WIRES
360104 -- Metals & Alloys-- Physical Properties
656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ASBESTOS
CHALCOGENIDES
CRITICAL FIELD
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
GINZBURG-LANDAU THEORY
MAGNETIC FIELDS
MERCURY
METALS
NIOBIUM COMPOUNDS
NIOBIUM SELENIDES
NITRIDES
NITROGEN COMPOUNDS
ONE-DIMENSIONAL CALCULATIONS
PHYSICAL PROPERTIES
PNICTIDES
SELENIDES
SELENIUM COMPOUNDS
SULFUR COMPOUNDS
SULFUR NITRIDES
SUPERCONDUCTING WIRES
SUPERCONDUCTIVITY
TANTALUM COMPOUNDS
TANTALUM SELENIDES
TRANSITION ELEMENT COMPOUNDS
WIRES