THE ELECTRIC-FIELD UNDER A STM TIP APEX - IMPLICATIONS FOR ADSORBATE MANIPULATION

被引:39
作者
GIRARD, C
JOACHIM, C
CHAVY, C
SAUTET, P
机构
[1] LOE,CEMES,ELECTR MOLEC GRP,F-31055 TOULOUSE,FRANCE
[2] ENS,CHIM THEOR LAB,F-69364 LYON 07,FRANCE
关键词
D O I
10.1016/0039-6028(93)90944-F
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
For a given bias voltage, a self-consistent calculation of the electrostatic polarization of the STM tip apex at tunneling distance to a conducting surface is presented. An effective atomic structure of the tip apex during a scan is constructed by fitting calculated and experimental STM scans on the Au(110) surface. The local electric field in the tip-sample gap is calculated. This leads to the inductive electrostatic potential energy gained by a physisorbed atom like xenon when the STM tip apex is approaching this adsorbate. Field induced diffusion processes of this adsorbate are discussed.
引用
收藏
页码:400 / 410
页数:11
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