Abstract
In the frame of a single coherent picture for the electron lattice interactions in mixed valent Rare Earth compounds, the phase diagrams and phonon dispersions are studied. Our model is introduced on a microscopic level and discussed in detail. The mechanism of the phase transition and the role of the lattice is illuminated and various properties are considered in a model calculation. Anomalies in the phonon dispersions of Sm1−x Y x S, which have recently been found, find a satisfying explanation.
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Grewe, N., Entel, P. Lattice dynamics in mixed valent Rare Earth compounds. Z Physik B 33, 331–340 (1979). https://doi.org/10.1007/BF01319922
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DOI: https://doi.org/10.1007/BF01319922