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arXiv 1002.4291cond-mat.mes-hallcond-mat.mtrl-sci
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电化学环境中原子尺寸铅接触的电导

Conductance of Atomic-Sized Lead Contacts in an Electrochemical Environment

F. -Q. Xie, F. Hüser, F. Pauly, Ch. Obermair, G. Schön, Th. Schimmel

摘要:

原子大小的铅(Pb)接触沉积和溶解在电化学环境中,并测量其传输特性。由于电化学制造过程中,我们得到机械无应变的接触和电导直方图与尖锐的解决,个别峰。基于密度泛函理论的电荷输运计算结果与实验结果吻合较好。根据原子构型的不同,同一种金属的单原子宽接触产生非常不同的电导值。

英文摘要:

Atomic-sized lead (Pb) contacts are deposited and dissolved in an electrochemical environment, and their transport properties are measured. Due to the electrochemical fabrication process, we obtain mechanically unstrained contacts and conductance histograms with sharply resolved, individual peaks. Charge transport calculations based on density functional theory (DFT) for various ideal Pb contact geometries are in good agreement with the experimental results. Depending on the atomic configuration, single-atom-wide contacts of one and the same metal yield very different conductance values.

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