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Low-Field Phase Diagram of Layered Superconductors: The Role of Electromagnetic Coupling

Gianni Blatter, Vadim Geshkenbein, Anatoli Larkin, Henrik Nordborg

supr-conarXiv:supr-con/9507003

Abstract

We determine the position and shape of the melting line in a layered superconductor taking the electromagnetic coupling between layers into account. In the limit of vanishing Josephson coupling we obtain a new generic reentrant low-field melting line. Finite Josephson coupling pushes the melting line to higher temperatures and fields and a new line shape B m (1-T/Tc)3/2 is found. We construct the low-field phase diagram including melting and decoupling lines and discuss various experiments in the light of our new results.

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