Transport property of a Nd2-xCexCuO4-δ single crystal in the magnetic-field-driven normal state:: in-plane and out-of-plane resistivity

In-plane and out-of-plane resistivities were measured under magnetic fields up to 14 T on Nd2-xCexCuO4-delta single crystals with x = 0.14 and 0.16. A resistivity upturn with log(1/T) divergence both in plane and out of plane and a deviation from this divergence at low temperatures were observed when the superconductivity was completely suppressed. rho(c)/rho(ab) increases with decreasing temperature at high temperatures. In the low temperature range of log(1/T) behaviour, the field-induced normal-state anisotropy ratio becomes nearly constant for the underdoped sample with x = 0.14, and even decreases a little for the optimally doped sample with x = 0.16, suggesting a 3D behaviour accompanying the log(1/T) divergence, similar to the underdoped La2-xSrxCuO4 system. This is in contrast to the quasi-2D carrier confinement behaviour of the underdoped regime. The results can be explained well using the granular model.