Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2010-02-22
Physics
Condensed Matter
Disordered Systems and Neural Networks
3 pages
Scientific paper
Phase fluctuations in finite thickness layered superconducting films are studied theoretically. The model consists of a set of layers, coupled to each other via a gradient-like term in the phase-only action. It is shown that the effective phase stiffness of the whole system is proportional to its thickness (i.e. the number of individual layers). This result leads to a superconductor-insulator transition and an inverse dependence of $T_c$ on thickness,$T_c\sim d^{-1}$, both in accord with the experimental findings. The relevance to disordered thin films is discussed.
Balatsky Alexander V.
Biswas Ranjit
Dubi Yonatan
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