Mariu Z. "The upper critical field in superlatticies and layered superconductors"

Object - nonlinearities in the temperature behavior of the upper critical magnetic field of superconducting superlattices and layered structures; goal - development of the phenomenological models necessary for the qualitative and quantitative description of different types of nonlinearities in the temperature behavior of the upper critical magnetic field in superconducting superlattices and layered structures; method - the mathematical formalism of the transfer-matrix, the quasiclassical approach, the Ginzburg-Landau equations; results and novelty - an analytic equation is derived which describes all types of the crossovers and nonlinearities in the temperature behavior of the upper critical field observed so far in superlattices, in the quasiperiodic Fibonacci superlattices, and superlattices whith a regular network of mismatch dislocations within the planes. A fundamental relation between the crossovers in the temperature dependency of the upper critical field and nonlinearities in the vortex latticemelting line is established for all types of superlattices; employment - research of fundamental physical phenomena, novel superconductors.