Abstract

We present resistivity measurements of the upper critical field (Hc2) phase diagram as a function of temperature (T) for Nd1.85Ce0.15CuO4+δ/SrTiO3 single crystal films with different degree of disorder (δ) in magnetic fields up to 90 kOe at temperatures down to 0.4K. The data are well described by a two-band/two-gap model for a superconductor in the dirty limit.

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