Saturation of the phase coherence length at low temperatures in Pr 1.95Ce 0.05CuO 4

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Using fits of two-dimensional weak-localization theory to the magnetoresistance in the non-metallic regime, we extract the temperature dependence of the phase coherence length of non-superconducting Pr 2−χCe χCuO 4 with x= 0.05. We find that this characteristic length saturates at low temperatures, correlating with the deviations from ln( T) behavior observed in the resistivity.