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2001 | 100 | 6 | 885-895
Article title

Superconductivity of the Two-Dimensional Penson-Kolb Model

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EN
Abstracts
EN
Two-dimensional (d=2) Penson-Kolb model, i.e. the tight-binding model with the pair-hopping (intersite charge exchange) interaction, is considered and the effects of phase fluctuations on the s-wave superconductivity of this system are discussed within the Kosterlitz-Thouless scenario. The London penetration depth λ at T=0, the Kosterlitz-Thouless critical temperature T_c, and the Hartree-Fock approximation critical temperature T_p are determined as a function of particle concentration and interaction. The Uemura type plots (T_c vs.λ^{-2}(0)) are derived. Beyond weak coupling and for low concentrations they show the existence of universal scaling: T_c ~1/λ^2(0), as it was previously found for the attractive Hubbard model and for the models with intersite electron pairing.
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EN
Contributors
author
  • Institute of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
  • Institute of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv100n603kz
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