Surface strain versus substrate interaction in heteroepitaxial metal layers:: Pt on Ru(0001) -: art. no. 016101

被引：332

作者：

Schlapka, A ^{[1
]}

Lischka, M ^{[1
]}

Gross, A ^{[1
]}

Käsberger, U ^{[1
]}

Jakob, P ^{[1
]}

机构：

[1] Tech Univ Munich, Dept Phys, D-85747 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.91.016101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By studying the adsorption of CO on up to 30 layers of Pt deposited on Ru(0001) the influence of surface strain on the adsorption energy has been disentangled from the residual chemical interaction with the substrate. While the electronic influence of the substrate has largely vanished for three Pt layers, the effect of surface strain due to the 2.5% lattice mismatch of Pt and Ru remains initially intact and is only gradually released for ngreater than or equal to5 Pt layers. Electronic structure calculations confirm the experimental observations, in particular, the dramatic decrease of the CO adsorption energy on a single Pt layer which is caused by the strong Pt-Ru interlayer coupling.

引用

页码：016101/1 / 016101/4

页数：4

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