Effect of electron-phonon interaction on the shift and attenuation of optical phonons
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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