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

被引：27

作者：

GARCIAHERNANDEZ, M

BERMEJO, FJ

FAK, B

MARTINEZ, JL

ENCISO, E

ALMARZA, NG

机构：

[1] CEN,DEPT RECH FONDAMENTALE MAT CONDENSEE,F-38041 GRENOBLE,FRANCE

[2] UNIV AUTONOMA MADRID,FAC CIENCIAS,INST CIENCIA MAT,SEDE B,E-28049 MADRID,SPAIN

[3] UNIV COMPLUTENSE MADRID,DEPT QUIM FIS I,E-28040 MADRID,SPAIN

[4] UNIV SEVILLA,DEPT FIS MAT CONDENSADA,E-41080 SEVILLE,SPAIN

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.48.149

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页码：149 / 160

页数：12

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