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Single-channel transmission in gold one-atom contacts and chains

G. Rubio-Bollinger·C. de las Heras·E. Bascones·N. Agrait·F. Guinea·S. Vieira
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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 $I(V)$ 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.

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G. Rubio-Bollinger, C. de las Heras, E. Bascones, N. Agrait, F. Guinea, S. Vieira. 2003-03-11. Single-channel transmission in gold one-atom contacts and chains. https://doi.org/10.1103/physrevb.67.121407

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