LEED investigations on Co(0001):: the (√3 x √3)R30°-CO overlayer

被引：60

作者：

Lahtinen, J

Vaari, J

Kauraala, K

Soares, EA

Van Hove, MA

机构：

[1] Helsinki Univ Technol, Phys Lab, FIN-02015 Helsinki, Finland

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

SURFACE SCIENCE | 2000年 / 448卷 / 2-3期

基金：

芬兰科学院;

关键词：

carbon monoxide; cobalt; low energy electron diffraction (LEED); surface structure; morphology; roughness; and; topography;

D O I：

10.1016/S0039-6028(99)01228-5

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：

The local adsorption structure of CO on Co(0001) has been determined at 160 K using dynamical low-energy electron diffraction (LEED). The CO molecules in the (root 3 x root 3)R30 degrees-CO overlayer adopt the on-top site with the CO axis perpendicular to the surface and induce buckling in the top Co layer pulling the Co atom beneath the CO by 0.04 +/- 0.04 Angstrom outwards. The optimum length for the CO bond is 1.17 +/- 0.06 Angstrom and that for the C-Co distance 1.78 +/- 0.06 Angstrom. The first-layer Co-Co distance is 2.04 Angstrom and thus only slightly expanded from the bulk value. The structure obtained is compared with other known CO structures on transition metals. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：269 / 278

页数：10

共 48 条

[1] THE STRUCTURE OF C(2 X 2) CO ADSORBED ON COPPER AND NICKEL (001) SURFACES [J].