Thermal fluctuation and melting of the vortex lattice in oxide superconductors

Journal Article · Mon Sep 04 04:00:00 EDT 1989 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.63.1106· OSTI ID:5575075

Brandt, E H ^[1]

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1. Max-Planck-Institut fur Festkorperforschung, D-7000 Stuttgart 80, Federal Republic of Germany (DE)

The thermal fluctuation of the vortex positions in type-II superconductors with large Ginzburg-Landau parameter {kappa} and weak pinning is drastically increased when calculated from the correct nonlocal elasticity of the vortex lattice. As compared to the usual (local) elastic result, the mean-square shear strain and vortex displacements increase by a factor of {approx}({ital {bar B}}/{ital B}{sub {ital c}1}){sup 1/2}/(1{minus}{ital {bar B}}/{ital B}{sub {ital c}2}){sup 1/2} ({ital {bar B}} is the flux density, {ital B}{sub {ital c}1} and {ital B}{sub {ital c}2} are the lower and upper critical fields). The melting temperature of the vortex lattice is reduced by the same factor.

• OSTI ID: 5575075
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 63:10; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
CHALCOGENIDES
FLUCTUATIONS
GINZBURG-LANDAU THEORY
MAGNETIC FLUX
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
SHEAR PROPERTIES
STRAINS
SUPERCONDUCTORS
TEMPERATURE EFFECTS
TYPE-II SUPERCONDUCTORS
VARIATIONS