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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2001, Volume 73, Issue 2, Pages 84–86
(Mi jetpl4297)
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CONDENSED MATTER
Nonadiabatic effects in the phonon spectrum of metal compounds
A. I. Morosov Moscow State Institute of Radio-Engineering, Electronics and Automation (Technical University)
Abstract:
It is shown that nonadiabatic corrections to the dispersion law of optical phonons in the region of small wave vectors in the case of branches, for which the vibration with a zero wave vector is not accompanied by the appearance of a dipole moment in the ionic lattice, are significant for all possible directions of the wave vector. If a dipole moment arises, nonadiabatic corrections reach a noticeable value only for the wave-vector directions that are almost perpendicular to the direction of the dipole moment.
Received: 07.12.2000
Citation:
A. I. Morosov, “Nonadiabatic effects in the phonon spectrum of metal compounds”, Pis'ma v Zh. Èksper. Teoret. Fiz., 73:2 (2001), 84–86; JETP Letters, 73:2 (2001), 79–81
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https://www.mathnet.ru/eng/jetpl4297 https://www.mathnet.ru/eng/jetpl/v73/i2/p84
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Abstract page: | 130 | Full-text PDF : | 46 | References: | 1 |
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