PLASMON DISPERSION CONSTANT OF THE ALKALI-METALS

被引：16

作者：

TAUT, M

STURM, K

机构：

[1] Institut für Festkörperforschung, Forschungszentrum Jülich GmbH

来源：

SOLID STATE COMMUNICATIONS | 1992年 / 82卷 / 04期

关键词：

D O I：

10.1016/0038-1098(92)90644-O

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Exchange-correlation and band structure corrections to the plasmon dispersion constants of the alkalis are calculated using local- and nonlocal density functional theory, in order to understand the anomalously low plasmon dispersion for small wavevectors of the heavy alkali metals recently observed in EELS experiments. We find a qualitative improvement of the plasmon dispersion at small wavevector due to the combined effect of exchange-correlation and crystal potential. Possible mechanisms to explain the remaining discrepancies are discussed.

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页码：295 / 299

页数：5

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