Abstract
The dispersion in the entire Brillouin zone and the temperature dependence (right up to the melting temperature) of the anharmonic frequency shift and phonon damping in a number of fcc metals is investigated on the basis of microscopic calculations. It is found that the anharmonic effects depend sharply on the wave vector in the directions Г-X, X-W, and Г-L and, in contrast to bcc metals, the magnitude of the effects is not due to the softness of the initial phonon spectrum. It is shown that the relative frequency shifts and the phonon damping near melting do not exceed 10–20%. The relative role of various anharmonic processes is examined, and the relation between the results obtained and existing experimental data is discussed.
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References
V. K. Vaks, Introduction to the Microscopic Theory of Ferroelectrics (Nauka, Moscow, 1973).
V. G. Vaks, S. P. Kravchuk, and A. V. Trefilov, J. Phys. F 10, 2325 (1980).
M. I. Katsnel’son and A. V. Trefilov, Fiz. Met. Metalloved. 64, 629 (1987).
V. G. Vaks, S. P. Kravchuk, and A. V. Trefilov, J. Phys. F 10, 2105 (1980).
M. Zoli, G. Santoro, V. Bortolani et al., Phys. Rev. B 41, 7507 (1990).
Y. Y. Ye, Y. Chen, K. M. Ho et al., Phys. Rev. Lett. 58, 1769 (1987); J. Phys.: Condens. Matter 3, 9629 (1991).
V. G. Vaks, G. D. Samolyuk, and F. V. Trefilov, Phys. Lett. A 127, 37 (1988).
A. S. Ivanov, M. I. Katsnelson, A. G. Mikhin et al., Philos. Mag. B 69, 1183 (1994).
M. I. Katsnelson, I. I. Naumov, A. V. Trefilov et al., Philos. Mag. B 75, 389 (1997).
R. C. Shukla and E. R. Cowley, Phys. Rev. B 58, 2596 (1998).
H. Böttger, Principles of the Theory of Lattice Dynamics (Physik-Verlag, Weinheim, 1983; Mir, Moscow, 1986).
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Pis’ma Zh. Éksp. Teor. Fiz. 69, No. 9, 649–652 (10 May 1999)
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Katsnel’son, M.I., Trefilov, A.V. & Khromov, K.Y. Characteristic features of anharmonic effects in the lattice dynamics of fcc metals. Jetp Lett. 69, 688–693 (1999). https://doi.org/10.1134/1.568076
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DOI: https://doi.org/10.1134/1.568076