Microscopic theory of equilibrium properties of F/S/F trilayers with weak ferromagnets
arXiv:cond-mat/0312029 · doi:10.1140/epjb/e2004-00188-7
Abstract
The aim of this paper is to explain the non monotonic temperature dependence of the self-consistent superconducting gap of ferromagnet/superconductor/ferromagnet (F/S/F) trilayers with weak ferromagnets in the parallel alignment (equivalent to F/S bilayers). We show that this is due to Andreev bound states that compete with the formation of a minigap. Using a recursive algorithm we discuss in detail the roles of various parameters (thicknesses of the superconductor and ferromagnets, relative spin orientation of the ferromagnets, exchange field, temperature, disorder, interface transparencies).
arXiv comment13 pages, 11 figures, modifications in the presentation
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