Masses and Phase Structure in the Ginzburg-Landau Model

Details Masses and Phase Structure in the Ginzburg-Landau Model Masses and Phase Structure in the Ginzburg-Landau Model

1997-04-07

arxiv.org/abs/cond-mat/9704056v2

Phys.Rev. B57 (1998) 3011-3016

Physics

Condensed Matter

Superconductivity

16 pages, 6 figures. More data gathered, allowing more definite conclusions

Scientific paper

10.1103/PhysRevB.57.3011

We study numerically the phase structure of the Ginzburg-Landau model, with particular emphasis on mass measurements. There is no local gauge invariant order parameter, but we find that there is a phase transition characterized by a vanishing photon mass. For type I superconductors the transition is of 1st order. For type II 1st order is excluded by susceptibility analysis, but the photon correlation length suggests 2nd order critical behaviour with \nu ~ 1/2. The scalar mass, in contrast, does not show clear critical behaviour in the type II regime for V \to \infty, contrary to the conventional picture.

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