1212.6118 (T. B. Charikova et al.)

Upper critical field in electron-doped cuprate superconductor
Nd$_{2-x}$Ce$_x$CuO$_{4+δ}$: two-gap model    [PDF]

T. B. Charikova, N. G. Shelushinina, G. I. Harus, D. S. Petukhov, V. N. Neverov, A. A. Ivanov

We present resistivity measurements of the upper critical field (H$_{c2}$) phase diagram as a function of temperature (T) for Nd$_{1.85}$Ce$_{0.15}$CuO$_{4+\delta}$/SrTiO$_3$ single crystal films with different degree of disorder ($\delta$) in magnetic fields up to 90 kOe at temperatures down to 0.4 K. The data are well described by a two-band/two-gap model for a superconductor in the dirty limit.

View original: http://arxiv.org/abs/1212.6118