The influence of atoms of second coordination sphere on phonon dispersion of diamond
Within the framework of the phenomenological model of twoparticle interaction, the effect of the interaction energy of atoms from the second coordination sphere on the phonon dispersion is considered. This approach makes it possible to vary the growth of the phonon frequency relative to the optic...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Omsk State Technical University, Federal State Autonoumos Educational Institution of Higher Education
2020-11-01
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| Series: | Омский научный вестник |
| Subjects: | |
| Online Access: | https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2020/5%20(173)/111-113%20%D0%A1%D0%B0%D1%87%D0%BA%D0%BE%D0%B2%20%D0%92.%20%D0%90..pdf |
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| Summary: | Within the framework of the phenomenological model of twoparticle interaction, the effect of the interaction energy of atoms
from the second coordination sphere on the phonon dispersion is
considered. This approach makes it possible to vary the growth
of the phonon frequency relative to the optical phonon in the
center of the Brillun zone. The effects of the contribution to the
Raman spectra from longitudinal optical phonons with frequencies
higher than their frequency at the center of the Brillouin zone
are discussed. The contribution to the frequency of interaction of
atoms from the second coordination sphere for some phonons is
obtained in an explicit form. The formulas obtained will be useful
for calculating the spectra of Raman scattering of light by optical
phonons localized in diamond nanocrystals. |
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| ISSN: | 1813-8225 2541-7541 |