Crossover between weak and strong coupling in 2D superconductors

descriptionPublicationkeyboard_double_arrow_right Article 01 Jun 1997 English Publisher:Springer Science and Business Media LLCJournal:Journal of Superconductivity, volume 10, pages 199-203 (issn: 0896-1107, eissn: 1557-1947,

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Authors: M. Crisan; I. Tifrea;

doi: 10.1007/bf02770551

Crossover between weak and strong coupling in 2D superconductors

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Abstract

We study the crossover between weak coupling and strong coupling in two-dimensional (2D) superconductors atT⊋0 in the weak coupling regime, described by the BCS state, and we calculate the order parameter and the chemical potential atT=0 andT⊋0 for the model of a 2D superconductor. In the strong coupling regime the energy excitation has the scale of the pairs generated by the attractive interaction. The order parameter and the chemical potential atT⊋0 are calculated, and we show that there is a continuous transition between the two regimes.

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Technical University of Cluj-Napoca
Romania

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