Resistivity tensor correlations in the mixed state of electron-doped superconductor Nd2−xCexCuO4+δ

Abstract The magnetic-field dependencies of the longitudinal and Hall resistance of the electron-doped compounds Nd 2 − x Ce x CuO 4 + δ in underdoped region with x = 0.14 and with varying degrees of disorder ( δ ) were investigated. It was established experimentally that the correlation between the longitudinal electrical resistivity and the Hall resistivity can be analyzed on the basis of scaling relationships: ρ xy ( B ) ∼ [ ρ xx ( B )] β . For the totality of the investigated single-crystal films of Nd 2 − x Ce x CuO 4 + δ /SrTiO 3 the values of β from 0.8 to 1.55 is found. The observed feature in the electron-doped two-dimensional systems can be associated both with a displaying of anisotropic s - wave or d - wave pairing symmetry and with a pinning due to an essential degree of disorder in the samples under study.