DIMER STRUCTURE OF THE SI(001)2 X-1 AND C(4 X-2) RECONSTRUCTIONS DERIVED FROM CORE-LEVEL AND VALENCE-BAND PHOTOEMISSION RESULTS

被引：22

作者：

LANDEMARK, E

KARLSSON, CJ

CHAO, YC

UHRBERG, RIG

机构：

[1] Department of Physics and Measurement Technology, Linköping Institute of Technology

来源：

SURFACE SCIENCE | 1993年 / 287卷

关键词：

D O I：

10.1016/0039-6028(93)90836-9

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：

Extremely well resolved core-level spectra have been obtained from the clean Si(001) surface. Si 2p spectra from the cold c(4 x 2) and the RT 2 x 1 surfaces are very similar, implying that the local structure of the two reconstructions is the same. Shifted components originating from both up- and down-atoms of asymmetric dimers, as well as second-layer atoms, are identified. The valence-band electronic structure has been studied with angle-resolved photoemission. The ordering of the buckled dimers is discussed and the c(4 x 2) to 2 x 1 phase transition is interpreted in terms of a loss of long-range order among antiferromagnetically ordered buckled dimers.

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页码：529 / 533

页数：5

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