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Critical fluctuations in superconductors

S. Kolnberger, R. Folk

DOI 10.1103/PhysRevB.41.4083 · Physical Review B

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Abstract

The field-theoretical gauge model for a superconductor, generalized to a n/2-component complex order parameter, is renormalized in two-loop order. The question of a fluctuation-induced first-order transition is discussed, and the crossover functions for the effective exponents and the amplitude ratio of the specific heats above and below Tc are given.

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