Stretching single atom contacts at multiple subatomic step-length
Literature Information
Yi-Min Wei, Jing-Hong Liang, Zhao-Bin Chen, Xiao-Shun Zhou, Bing-Wei Mao, Oscar A. Oviedo, Ezequiel P. M. Leiva
This work describes jump-to-contact STM-break junction experiments leading to novel statistical distribution of last-step length associated with conductance of a single atom contact. Last-step length histograms are observed with up to five for Fe and three for Cu peaks at integral multiples close to 0.075 nm, a subatomic distance. A model is proposed in terms of gliding from a fcc hollow-site to a hcp hollow-site of adjacent atomic planes at 1/3 regular layer spacing along with tip stretching to account for the multiple subatomic step-length behavior.
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