Effect of electron-phonon interaction on the shift and attenuation of optical phonons
L. A. Falkovsky
Abstract
Using the Boltzmann equation for electrons in metals, we show that the optical phonons soften and have a dispersion due to screening in agreement with the results reported recently [M. Reizer, Phys. Rev. B 61, 40 (2000)]. Additional phonon damping and frequency shift arise when the electron--phonon interaction is properly included.
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