Abstract
We study the thermoelectric power of metals containing magnetic impurities with crystal-field split energy levels. Of special interest is the case where the ground state is a nonmagnetic singlet. It is shown that anomalous contributions arise, whose size can be nearly comparable with that found in the Kondo problem. However the mechanism leading to these effects is very different in the present problem, since it results from differences in the thermal population of the impurity levels. Also the anomalous contributions appear in a lower order of perturbation theory than they do in the corresponding Kondo problem calculations.
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We would like to thank Dr. H. U. Everts for a stimulating discussion, Dr. L. Hirst for helpful remarks and Dr. H. Engler for the numerical calculation. One of us (P.F.) would also like to thank the Deutsche Forschungsgemeinschaft for supporting this work.
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Peschel, I., Fulde, P. Crystalline field effects in metals: Thermoelectric power. Z. Physik 238, 99–109 (1970). https://doi.org/10.1007/BF01399296
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DOI: https://doi.org/10.1007/BF01399296