Abstract
The microscopic theory of force constants is employed for calculating the phonon frequencies of potassium. As in a preceeding paper we rely upon the translation invariance requirement in the form of a sum rule. Because of this sum rule and an interpolation of the electronic density we can avoid any approximation for the density-density correlation function. The resultant phonon spectrum is in good agreement with experiment.
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Aviran, A., Weilacher, K.H. & Bross, H. Calculation of the phonon spectrum of potassium with a microscopic theory. Z Physik B 29, 13–15 (1978). https://doi.org/10.1007/BF01354832
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DOI: https://doi.org/10.1007/BF01354832