Transport properties of moderately disordered UCu$_4$Pd

Details Transport properties of moderately disordered UCu$_4$Pd Transport properties of moderately disordered UCu$_4$Pd

2005-05-17

arxiv.org/abs/cond-mat/0505418v1

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 9 figures, submitted PRB

Scientific paper

10.1103/PhysRevB.72.024457

We present a detailed study on the (magneto)transport properties of as-cast and heat treated material UCu$_4$Pd. We find a pronounced sample dependence of the resistivity $\rho$ of as-cast samples, and reproduce the annealing dependence of $\rho$. In our study of the Hall effect we determine a metallic carrier density for all samples, and a temperature dependence of the Hall constant which is inconsistent with the Skew scattering prediction. The magnetoresistive response is very small and characteristic for spin disorder scattering, suggesting that overall the resistivity is controlled mostly by nonmagnetic scattering processes. We discuss possible sources for the temperature and field dependence of the transport properties, in particular with respect to quantum criticality and electronic localization effects.

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