Photoinduced plasmon excitations in alkali-metal overlayers

被引：37

作者：

Barman, SR ^{[1
]}

Horn, K

Haberle, P

Ishida, H

Liebsch, A

机构：

[1] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

[2] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile

[3] Nihon Univ, Coll Humanities & Sci, Tokyo 156, Japan

[4] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.57.6662

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Collective surface excitations in alkali-metal overlayers are observed using photoyield spectroscopy. Spectra for Na and K on Al(111) reveal a multipole surface plasmon and bulklike overlayer plasmon. In contrast-Li on Al exhibits only the multipole mode. In the submonolayer regime, all three alkali metals provide evidence for the threshold excitation. Time-dependent density-functional calculations for realistic alkali-metal overlayers agree well with these observations.

引用

页码：6662 / 6665

页数：4

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