LOW-FREQUENCY EXCITATIONS IN GLASSY SELENIUM - A COMPARISON OF NEUTRON-SCATTERING AND MOLECULAR-DYNAMICS RESULTS

Article

关键词: AMORPHOUS SELENIUM;    LIQUID;    RANGE;   

DOI  :  10.1103/PhysRevB.48.149

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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