Optical sum increase due to electron undressing
作者： A. Knigavko , J. P. Carbotte , F. Marsiglio
DOI: 10.1103/PHYSREVB.70.224501
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摘要: The total optical sum is a constant, independent of many-body interactions, impurity scattering and temperature. For single band in metal, such rule no longer the interactions or temperature, when dispersion and/or finite bandwidth accounted for. We adopt model, with electrons coupled to Einstein oscillator frequency ${\ensuremath{\omega}}_{E}$ study spectral weight. depends on both strength coupling characteristic phonon frequency, ${\ensuremath{\omega}}_{E}$. A hardening leads electron undressing translates into decrease kinetic energy an increase sum. Our model produces temperature dependence this as seen recent experiments.
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