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.
Kosterlitz-Thouless vs. Ginzburg-Landau description of 2D superconducting fluctuations / Benfatto, L.; Perali, A.; Castellani, Claudio; Grilli, Marco. - In: THE EUROPEAN PHYSICAL JOURNAL. B, CONDENSED MATTER PHYSICS. - ISSN 1434-6028. - 13:4(2000), pp. 609-612. [10.1007/s100510050076]
Kosterlitz-Thouless vs. Ginzburg-Landau description of 2D superconducting fluctuations
L. Benfatto;CASTELLANI, Claudio;GRILLI, Marco
2000
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
