Effect of thermal vibration and the solid-liquid phase transition on electron dynamics: An inelastic x-ray-scattering study on Al

被引:21
作者
Sternemann, C [1 ]
Kaprolat, A [1 ]
Schulke, W [1 ]
机构
[1] Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany
来源
PHYSICAL REVIEW B | 1998年 / 57卷 / 01期
关键词
D O I
10.1103/PhysRevB.57.622
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Inelastic-x-ray-scattering measurements of the dynamic structure factor, S(q,omega), of electrons in Al both in the solid phase at rising temperatures and in the liquid are presented. The double-peak structure of S(q,omega) for q>q(c) (q(c)=plasmon cutoff vector), diminishes gradually with decreasing strength of the ion-core potential; the peak position and the sloping plateau of the S(q,omega) spectra for q>q(c) do not exhibit marked changes upon melting. The plasmon energy for q<q(c) shifts according to the variation of the electron density upon heating and melting, and does not respond to the loss of long-range order.
引用
收藏
页码:622 / 626
页数:5
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