Generalized collective modes approach: Mode contributions to time correlation functions in liquid lead
Contributions of different collective excitations to the density-density and heat-heat time correlation functions in pure liquids are studied within an approach of generalized collective modes. It is shown, that a kinetic relaxing mode, caused by slow density fluctuations, defines almost complete...
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| Date: | 2001 |
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| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Published: |
Інститут фізики конденсованих систем НАН України
2001
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| Series: | Condensed Matter Physics |
| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/120475 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Generalized collective modes approach: Mode contributions to time correlation functions in liquid lead / T. Bryk, I. Mryglod // Condensed Matter Physics. — 2001. — Т. 4, № 3(27). — С. 387-405. — Бібліогр.: 23 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | Contributions of different collective excitations to the density-density and
heat-heat time correlation functions in pure liquids are studied within an approach
of generalized collective modes. It is shown, that a kinetic relaxing
mode, caused by slow density fluctuations, defines almost completely the
shape of density-density time correlation function for wavenumbers close
to the main peak position of the static structure factor. Analytical threevariable
model is used to explain negative amplitudes of contributions to
dynamical structure factor from short-wavelength excitations. Such contributions
can appear in the range of wavenumbers close to the main peak
position of static structure factor. |
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