Article
Low-frequency excitations in glassy selenium: A comparison of neutron-scattering and molecular-dynamics results
Author/s | García Hernández, M.
Bermejo, F. J. Fak, B. Martínez, J.L. Enciso, E. Almarza, N.G. Criado Vega, Alberto |
Department | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Publication Date | 1993 |
Deposit Date | 2017-04-19 |
Published in |
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Abstract | The microscopic low-frequency dynamics of glassy selenium is investigated by means of the concurrent use of neutron inelastic scattering and computer simulations. A separation of the dynamic response in terms of intra- and ... The microscopic low-frequency dynamics of glassy selenium is investigated by means of the concurrent use of neutron inelastic scattering and computer simulations. A separation of the dynamic response in terms of intra- and interchain processes is achieved from the analysis of the simulation results. The S(Q,E) dynamic structure factors are analyzed in terms of the frequency moments or from a model scattering law, and the wave-vector dependence of the relevant quantities is established. Finally, the anomalous behavior of the heat capacity at moderately low temperatures is shown to be originated by mostly interchain interactions. |
Funding agencies | Dirección General de Investigación Científica y Técnica (DGICYT). España |
Project ID. | PB89-0037-C0 |
Citation | García Hernández, M., Bermejo, F.J., Fak, B., Martínez, J.L., Enciso, E., Almarza, N.G. y Criado Vega, A. (1993). Low-frequency excitations in glassy selenium: A comparison of neutron-scattering and molecular-dynamics results. Physical Review B-Condensed Matter, 48 (1), 149-160. |
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