Kosterlitz-Thouless vs Ginzburg-Landau description of 2D superconducting fluctuations

Details Kosterlitz-Thouless vs Ginzburg-Landau description of 2D superconducting fluctuations Kosterlitz-Thouless vs Ginzburg-Landau description of 2D superconducting fluctuations

1999-06-25

arxiv.org/abs/cond-mat/9906384v1

Eur. Phys. J. B 13, 609 (2000)

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures enclosed

Scientific paper

10.1007/s100510050076

We evaluate the charge and spin susceptibilities of the 2D attractive Hubbard model and we compare our results with Montecarlo simulations on the same model. We discuss the possibility to include topological Kosterlitz-Thouless superconducting fluctuations in a standard perturbative approach substituting in the fluctuation propagator the Ginzburg-Landau correlation length with the Kosterlitz-Thouless correlation length.

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