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Título: | Low-frequency excitations in glassy selenium: A comparison of neutron-scattering and molecular-dynamics results |
Autor: | García-Hernández, Mar CSIC ORCID ; Bermejo, Francisco Javier CSIC ORCID; Fåk, B.; Martínez, J. L. CSIC ORCID ; Enciso, Eduardo; Almarza, Noé G. CSIC ORCID; Criado, A. | Fecha de publicación: | 1-jul-1993 | Editor: | American Physical Society | Citación: | Physical Review B 48: 149- 160 (1993) | Resumen: | 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. © 1993 The American Physical Society. | Descripción: | 12 págs.; 9 figs.; 1 tab. | Versión del editor: | https://doi.org/10.1103/PhysRevB.48.149 | URI: | http://hdl.handle.net/10261/140343 | DOI: | 10.1103/PhysRevB.48.149 | Identificadores: | doi: 10.1103/PhysRevB.48.149 issn: 0163-1829 |
Aparece en las colecciones: | (ICMM) Artículos (CFMAC-IEM) Artículos |
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Low-frequency.pdf | 710,24 kB | Adobe PDF | Visualizar/Abrir |
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