Phase fluctuations in finite thickness disordered superconducting thin films

2010/02/22 by Y. Dubi, Dubi, Y., R. R. Biswas +3
Physics and Astronomy · #Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Superconductivity (cond-mat.supr-con) #cond-mat.dis-nn #cond-mat.mes-hall #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.1002.4203

3 pages

arxiv created 2010/12/22 · arxiv updated 2010/12/23

Abstract

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∼ d^-1, both in accord with the experimental findings. The relevance to disordered thin films is discussed.

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