Crossover from Cooper Pairing to Bose Condensation in van Hove Superconductors with Localized States

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Abstract

We showed that in a two-dimensional superconductor with logarithmic density of states (van Hove superconductor) the crossover between weak and strong coupling is possible. The influence of localized states induced by impurities on this transition has been studied at T = 0.

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