학술논문
Single-channel transmission in gold one-atom contacts and chains
Document Type
Working Paper
Source
Subject
Language
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.
Comment: 4 pages, 2 figures. To be published in Phys. Rev. B, Rapid Communications (2003)
Comment: 4 pages, 2 figures. To be published in Phys. Rev. B, Rapid Communications (2003)