Abstract
We have studied the influence of nonmagnetic impurities on the electrical resistivity of a mixed valent host. The model we consider is the periodic Anderson model where we change the energy parameters at the sites occupied by the randomly distributed impurities. The propagator of the pure system has been obtained by a decoupling scheme [1]. We use the CPA to perform the impurity average for the one-particle Green's function and Kubo's formula to calculate the electrical conductivity. Numerical analysis shows that the resistivity decreases monotonously with increasing temperature. This is in contrast to experimental results [2, 3] and possible reasons for the incorrect low-temperature behaviour are discussed.
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Dedicated to B. Mühlschlegel on the occasion of his 60th birthday
Address after October 1985: Imperial College, Department of Physics, Prince Consort Road, London SW7 2BZ, UK
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Wiethege, W., Costi, T. & Entel, P. The electrical resistivity of mixed valence materials due to nonmagnetic impurities. Z. Physik B - Condensed Matter 60, 189–194 (1985). https://doi.org/10.1007/BF01304438
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DOI: https://doi.org/10.1007/BF01304438