Contrast reversal and shape changes of atomic adsorbates measured with scanning tunneling microscopy

被引：57

作者：

Calleja, F

Arnau, A

Hinarejos, JJ

de Parga, ALV

Hofer, WA

Echenique, PM

Miranda, R

机构：

[1] Univ Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, Spain

[2] Univ Basque Country, Dept Fis Mat, San Sebastian, Spain

[3] CSIC UPV, Ctr Mixto, San Sebastian, Spain

[4] Univ Liverpool, Surface Sci Res Ctr, Liverpool L69 3BX, Merseyside, England

[5] Donostia Int Phys Ctr, San Sebastian, Spain

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.92.206101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Systematic, quantitative comparisons between scanning tunneling microscopy (STM) experiments and first principles simulations of O(2x2)/Ru(0001) have been performed. The shape of the atomic adsorbates in the images depends strongly on the tunneling resistance and changes reversibly from circular (high resistance) to triangular (low resistance). In addition, after adsorption of oxygen on the STM tip we observe a contrast reversal on the surface, confirmed by extensive numerical simulations.

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页码：206101 / 1

页数：4

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