Weak magnetoresistance of disordered heavy fermion systems

1998/05/11 by A. Chattopadhyay, Chattopadhyay, A., M. Jarrell +9
Physics and Astronomy · #FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.cond-mat/9805127

4 pages, 3 figures

arxiv created 1998/05/11 · arxiv updated 2009/11/30

Abstract

We compare the magnetoresistance of UCu_3.5Pd_1.5 with calculations done within the disordered heavy fermion framework of Miranda et al. using a phenomenological spectral function for the Anderson model, calibrated against Bethe ansatz and quantum Monte Carlo results. Both in experiment and theory, we find a weak negative magnetoresistance. In contrast, thermodynamic quantities have a strong field dependence. Using qualitative arguments broad distribution of Kondo scales, we explain the different field dependence of susceptibility and resistivity.

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