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Upper critical field Hc3 for a superconducting superlattice

B. J. Yuan, J. P. Whitehead

DOI 10.1103/PhysRevB.44.6943 · Physical Review B

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Abstract

The transition temperature for a semi-infinite superconducting superlattice composed of alternating layers with different electron diffusion lengths is calculated in the presence of a homogeneous magnetic field aligned parallel to the layers. The effect of the free surface on the discontinuity in the upper critical field Hc3 that is manifest in such systems, over a certain range of parameters, is examined and the experimental implications of the results obtained are discussed.

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