Formation of a Metallic Contact: Jump to Contact Revisited
arXiv:cond-mat/0611122 · doi:10.1103/PhysRevLett.98.206801
Abstract
The transition from tunneling to metallic contact between two surfaces does not always involve a jump, but can be smooth. We have observed that the configuration and material composition of the electrodes before contact largely determines the presence or absence of a jump. Moreover, when jumps are found preferential values of conductance have been identified. Through combination of experiments, molecular dynamics, and first-principles transport calculations these conductance values are identified with atomic contacts of either monomers, dimers or double-bond contacts.
arXiv comment4 pages, 5 figures
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