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Electrical conductance of Rh atomic contacts under electrochemical potential control

机译:电化学势控制下Rh原子接触的电导

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摘要

The electric conductance of Rh atomic contacts was investigated under the electrochemical potential control. The conductance histogram of Rh atomic contacts varied with the electrochemical potential. When the electrochemical potential of the contact was kept at Φ_0=0.1 V vs Ag/AgCl (Rh potential), the conductance histogram did not show any features. At Φ_0=-0.1 V (under potential deposited hydrogen potential), the conductance histogram showed a feature around 2.3G0_ (G_0=2e~2/h), which agreed with the conductance value of a clean Rh atomic contact, which was observed in ultrahigh vacuum at low temperature. At Φ_0=-0.25 V (over potential deposited hydrogen potential), the conductance histogram showed features around 0.3G_0 and 1.0G_0. The conductance behavior of the Rh atomic contact was discussed by comparing previously reported results of other metals, Au, Ag, Cu, Pt, Pd, Ni, Co, and Fe. The conductance behavior of the metal atomic contacts related with the strength of the interaction between hydrogen and metal surface.
机译:在电化学电势控制下研究了Rh原子接触的电导率。 Rh原子接触的电导直方图随电化学势而变化。当触点的电化学电位相对于Ag / AgCl保持在Φ_0= 0.1 V时(Rh电位),电导直方图未显示任何特征。在Φ_0= -0.1 V(在潜在的沉积氢电势下)下,电导直方图显示出2.3G0_(G_0 = 2e〜2 / h)附近的特征,这与纯Rh原子接触的电导值相符,在低温超高真空。在Φ_0= -0.25 V(超过沉积的氢电势)下,电导直方图显示出0.3G_0和1.0G_0附近的特征。通过比较先前报告的其他金属Au,Ag,Cu,Pt,Pd,Ni,Co和Fe的结果,讨论了Rh原子接触的电导行为。金属原子接触的电导行为与氢和金属表面之间相互作用的强度有关。

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  • 来源
    《Physical review》 |2010年第12期|p.125422.1-125422.5|共5页
  • 作者单位

    Division of Chemistry, Graduate School of Science, Hokkaido University, N10W8 Kita, Sapporo 060-0810, Japan;

    rnDivision of Chemistry, Graduate School of Science, Hokkaido University, N10W8 Kita, Sapporo 060-0810, Japan PRESTO, Japan Science and Technology Agency, N10W8 Kita, Sapporo 060-0810, Japan Department of Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 W4-10 Ookayama, Meguro-ku, Tokyo 152-8551, Japan;

    rnDivision of Chemistry, Graduate School of Science, Hokkaido University, N10W8 Kita, Sapporo 060-0810, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    nanoscale contacts; contact resistance, contact potential; metal-to-metal contacts;

    机译:纳米级触点;接触电阻;接触电位;金属对金属触点;

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