Tip-induced surface polarization: A new mechanism for contrast in the scanning tunnelling microscope

被引：20
作者：
Ness, H
Fisher, AJ
Briggs, GAD
机构：
[1] UNIV LONDON UNIV COLL, DEPT PHYS & ASTRON, LONDON WC1E 6BT, ENGLAND
[2] UNIV OXFORD, DEPT MAT, OXFORD OX1 3PH, ENGLAND
来源：
SURFACE SCIENCE | 1997年 / 380卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
scanning tunneling microscopy;
D O I：
10.1016/S0039-6028(97)00003-4
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：
We propose a new mechanism influencing the contrast in STM images. Tt involves the polarization of the surface by the electric field from the tip; this effects the contrast when different parts of the surface have different polarizabilities. We demonstrate its importance for the case of ethene (C2H4) molecules adsorbed on the Si(001) surface; for this system we are able to obtain qualitative agreement between experiments and ab initio calculations by including the tip-induced field.
引用
收藏
页码：L479 / L484
页数：6
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