Vortex-glass phases in type-II superconductors
By T. Nattermann, S. Scheidl. 2000
226 citations recorded by the source corpus.
A review is given on the theory of vortex-glass phases in impure type-II superconductors in an external field. We begin with a brief discussion of the effects of thermal fluctuations on the spontaneously broken U(1) and translation symmetries, on the global phase diagram and on the critical behaviour. Introducing disorder we restrict ourselves to the experimentally most relevant case of weak uncorrelated randomness which is known to destroy the long-ranged translational order of the Abrikosov lattice in three dimensions. Elucidating possible residual glassy ordered phases, we distinguish between positional and phase-coherent vortex glasses. The study of the behaviour of isolated vortex lines and their generalization directed elastic manifolds in a random potential introduces further important concepts for the characterization of glasses. The discussion of elastic vortex glasses, i.e. topologically ordered dislocation-free positional glasses in two and three dimensions occupy the main part of our review. In particular, in three dimensions there exists an elastic vortex-glass phase which still shows quasi-long-range translational order: the 'Bragg glass'. It is shown that this phase is stable with respect to the formation of dislocations for intermediate fields. Preliminary results suggest that the Bragg-glass phase may not show phasecoherent vortex-glass order. The latter is expected to occur in systems with weak disorder only in higher dimensions (or for strong disorder, as the example of unscreened gauge glasses shows). We further demonstrate that the linear resistivity vanishes in the vortex-glass phase. The vortex-glass transition is studied in detail for a superconducting film in a parallel field. Finally, we review some recent developments concerning driven vortex-line lattices moving in a random environment.
Subfields: Condensed Matter Physics
View Paper: https://www.semanticscholar.org/paper/847e842eae657511f7e8c7f7902788285944fcea
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In Condensed Matter Physics
Citations in the corpus
- Ginzburg-Landau theory of type II superconductors in magnetic field (2009, methodology): “…original idea of the vortex glass and the continuous glass transition exhibiting the glass scaling of conductivity diverging in the glass phase appeared early in the framework of the so called frustrated XY model (the gauge glass) (Fisher, 1989; Fisher et al., 1991; Nattermann and Scheidl, 2000).”