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Configurations of 4f electrons in rare earth compounds

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Festkörperprobleme 16

Part of the book series: Advances in Solid State Physics ((ASSP,volume 16))

Abstract

Various anomalous physical properties of 4f electrons in semiconducting, metallic and mixed-valent compounds are reviewed. The rare earth (RE) monochalcogenides RE-X (X = O, S, Se, Te) have been selected as representatives of the manifold phenomena. The position in energy of the 4f states with respect to the Fermi level EF, as deduced from optical spectroscopy, has significant implications on the magnetic and electrical properties. Three different classes of materials are discussed: a) Semiconducting and, in part, magnetic RE2+ X2− compounds, b) metallic, antiferromagnetic RE3+ X2− compounds and c) metallic, nonmagnetic (homogencous) mixed-valence compounds. Particular emphasis is on the new, unusual features of 4f electrons in class c), such as nonintegral occupation number and nonmagnetic behavior. Selected opticla properties of the homogeneous mixed-valence state are discussed.

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Authors and Affiliations

  1. Max-Planck Institut für Festkörperforschung, Stuttgart, Germany

    Gernot Güntherodt

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  1. Gernot Güntherodt
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J. Treusch

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© 1976 Friedr. Vieweg & Sohn Verlagsgesellschaft mbH

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Güntherodt, G. (1976). Configurations of 4f electrons in rare earth compounds. In: Treusch, J. (eds) Festkörperprobleme 16. Advances in Solid State Physics, vol 16. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0107740

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  • DOI: https://doi.org/10.1007/BFb0107740

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