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

  • L. Benfatto
  • A. Perali
  • C. Castellani
  • M. Grilli
Rapid Note

Abstract:

We evaluate the charge and spin susceptibilities of the 2D attractive Hubbard model and we compare our results with Monte Carlo 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.

PACS. 74.20.De Phenomenological theories (two-fluid, Ginzburg-Landau, etc.) - 74.72.-h High- compounds - 74.25.-q General properties; correlations between physical properties in normal and superconducting states 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2000

Authors and Affiliations

  • L. Benfatto
    • 1
  • A. Perali
    • 1
  • C. Castellani
    • 1
  • M. Grilli
    • 1
  1. 1.Istituto Nazionale di Fisica della Materia e Dipartimento di Fisica, Università di Roma “La Sapienza”,Piazzale A. Moro 2, 00185 Roma, ItalyIT

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