STM studies of submonolayer coverages of Ag on Ge(111)

被引：25

作者：

Spence, DJ ^{[1
]}

Tear, SP ^{[1
]}

机构：

[1] Univ York, Dept Phys, York YO1 5DD, N Yorkshire, England

来源：

SURFACE SCIENCE | 1998年 / 398卷 / 1-2期

关键词：

adatoms; germanium; low-index single crystal surfaces; metal-semiconductor interfaces; scanning tunnelling microscopy; silver; surface relaxation and reconstruction;

D O I：

10.1016/S0039-6028(98)80014-9

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：

Submonolayer coverages of Ag on Ge(111) have been studied under ultra-high vacuum using STM. Atomically resolved images of the (root 33 x root 33)R30 degrees reconstruction have been obtained. The images obtained from the 4 x4 structure are strongly dependent upon the bias voltage polarity, indicating a significant influence from electronic effects. A new model is proposed which has the reconstruction occurring within the top bi-layer of an unreconstructed Ge(111) surface. STM images of the (root 33 x root 33)R30 degrees reconstruction show a structure very similar to that obtained for Ag/Si(111), indicating that the surface is a honeycomb-chained-trimer structure. Images have also been obtained of 3 x 1 and 5 x 1 regions and possible models for these structures are proposed. (C) 1998 Elsevier Science B.V.

引用

页码：91 / 104

页数：14

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