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Phonon Scattering by the F -Center Electron

Phonon Scattering by the F -Center Electron The scattering of phonons by the electron bound to the F center has been calculated using conventional perturbation theory. The process is analogous to the scattering of light from an atom, with the electron making virtual transitions to an excited state. In this case it is found that the most important transitions are to a level lying above the first excited state. It is found that the scattering rate initially follows a Rayleigh law, being proportional to ω 4 , where ω is the phonon frequency. However, as ω becomes larger than about half the Debye frequency, the scattering becomes weaker. Using the results of this calculation it has been possible to account for most of the experimentally observed effect of F centers on the thermal conductivity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review American Physical Society (APS)

Phonon Scattering by the F -Center Electron

Walton, D
Physical Review , Volume 135 (3A) – Aug 3, 1964
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Publisher
American Physical Society (APS)
Copyright
Copyright © 1964 The American Physical Society
ISSN
1536-6065
DOI
10.1103/PhysRev.135.A753
Publisher site
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Abstract

The scattering of phonons by the electron bound to the F center has been calculated using conventional perturbation theory. The process is analogous to the scattering of light from an atom, with the electron making virtual transitions to an excited state. In this case it is found that the most important transitions are to a level lying above the first excited state. It is found that the scattering rate initially follows a Rayleigh law, being proportional to ω 4 , where ω is the phonon frequency. However, as ω becomes larger than about half the Debye frequency, the scattering becomes weaker. Using the results of this calculation it has been possible to account for most of the experimentally observed effect of F centers on the thermal conductivity.

Journal

Physical Review – American Physical Society (APS)

Published: Aug 3, 1964

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