STRUCTURAL AND VIBRATIONAL PROPERTIES OF ALKALI-METAL OVERLAYERS ON METALS

被引：13

作者：

ISHIDA, H

MORIKAWA, Y

机构：

[1] Institute for Solid State Physics, University of Tokyo, Minato-ku, Tokyo, 106, Roppongi

来源：

SURFACE SCIENCE | 1993年 / 291卷 / 1-2期

关键词：

D O I：

10.1016/0039-6028(93)91479-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Structural and vibrational properties of adsorbed alkali-metal layers on a semi-infinite jellium surface are studied over a wide coverage range. Weakening of the adatom-substrate bond with increasing coverage leads to outward relaxation of the overlayer and decrease in the adatom-substrate stretching frequency. The dynamical charge associated with the adatom-substrate stretching vibration decreases much faster with increasing coverage than the static adatom dipole moment and changes its sign near the work-function minimum.

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页码：87 / 92

页数：6

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