Single-channel transmission in gold one-atom contacts and chains
arXiv:cond-mat/0303195 · doi:10.1103/PhysRevB.67.121407
Abstract
We induce superconductivity by proximity effect in thin layers of gold and study the number of conduction channels which contribute to the current in one-atom contacts and atomic wires. The atomic contacts and wires are fabricated with a Scanning Tunneling Microscope. The set of transmission probabilities of the conduction channels is obtained from the analysis of the characteristic curve which is highly non-linear due to multiple Andreev reflections. In agreement with theoretical calculations we find that there is only one channel which is almost completely open.
arXiv comment4 pages, 2 figures. To be published in Phys. Rev. B, Rapid Communications (2003)
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