Abstract
Theoretical work indicates that the curve of the critical temperature Tc0 against magnetic impurity concentration in Kondo superconductors may be re-entrant for a range of values of Tc0/Tk where Tk is the Kondo temperature. Tc0 is the superconducting critical temperature in the absence of magnetic impurities. In this case the resistivity of a thin film exhibits a minimum as a function of temperature close to the re-entrant point on the curve in the presence of superconducting fluctuations.
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