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Teoreticheskaya i Matematicheskaya Fizika, 1974, Volume 21, Number 3, Pages 415–423
(Mi tmf3909)
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This article is cited in 4 scientific papers (total in 4 papers)
Dispersion of the permittivity tensor of ionic crystals in the exciton region
A. F. Lubchenko, V. M. Nitsovich, N. V. Tkach
Abstract:
The Bogolyubov–Tyablikov method is used to allow simultaneously for the linear and
quadratic terms of the exciton-phonon interaction in a calculation of the two-time retarded
temperature Green's function of the excitons. It is shown that in the case of weak
exciten-phonon coupling the imaginary part of the permittivity tensor can be described by
a function of quasi-Lorentzian type, in which the temperature genesis of the parameters is determined by the linear, $\varphi$, and quadratic, $\Phi$, functions of the exciton-phonon coupling. For the interaction of excitons with high-energy phonons the contribution of $\Phi$ to the mass operator may be overwhelmingly important if $\Phi/\varphi>\varphi/\Omega$, where $\Omega$ is the phonon energy.
Received: 02.01.1974
Citation:
A. F. Lubchenko, V. M. Nitsovich, N. V. Tkach, “Dispersion of the permittivity tensor of ionic crystals in the exciton region”, TMF, 21:3 (1974), 415–423; Theoret. and Math. Phys., 21:3 (1974), 1244–1249
Linking options:
https://www.mathnet.ru/eng/tmf3909 https://www.mathnet.ru/eng/tmf/v21/i3/p415
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Abstract page: | 322 | Full-text PDF : | 128 | References: | 30 | First page: | 1 |
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