Direct observation of conductance fluctuations of a single-atom tunneling contact

被引：24

作者：

Sperl, A. ^{[1
]}

Kroeger, J. ^{[1
]}

Berndt, R. ^{[1
]}

机构：

[1] Univ Kiel, Inst Expt & Angew Phys, D-24098 Kiel, Germany

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 03期

关键词：

LATERAL MANIPULATION; METAL NANOBRIDGES; DIFFUSION; STEPS; NUCLEATION; MICROSCOPE; TRANSPORT; DYNAMICS; SURFACE; TIP;

D O I：

10.1103/PhysRevB.81.035406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using a cryogenic scanning tunneling microscope, the dynamics of lateral translations of a single silver atom adsorbed on Ag(111) were investigated with a time resolution of 10 ns. Elevated tunneling currents passed through the tip close to the adsorbed atom induce sudden adsorption site changes, which are reflected by two-level fluctuations of the tunneling conductance. The voltage dependence of the fluctuation rate reveals different local heating of the adsorbed atom in different positions relative to the tip.

引用

页数：6

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