ADSORBATE-INDUCED ELECTRONIC MODIFICATION OF ALKALI-METAL OVERLAYERS

被引：54

作者：

JACOBI, K

SHI, H

GRUYTERS, M

ERTL, G

机构：

[1] Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-14195 Berlin (Dahlem)

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.49.5733

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For submonolayer coverages of Cs on Ru(0001) surfaces, the Cs-Ru vibration is observed at 7.8 meV (63 cm-1) by means of high-resolution electron-energy-loss spectroscopy. At Cs coverages near the complete monolayer the adlayer becomes metallic as indicated by screening of the Cs-Ru vibration and the occurrence of an electronic excitation (plasmon) at 580 meV. Coadsorption of CO as well as of oxygen leads to the reappearance of the Cs-Ru vibration and the disappearance of the electronic excitation which is interpreted as a demetallization through chemical interaction with the coadsorbed species.

引用

页码：5733 / 5736

页数：4

共 29 条

[1] DIRECT MEASUREMENT OF POTASSIUM-PROMOTED CHANGE IN HEAT OF ADSORPTION OF CO ON NI(100) [J].