Journal
APPLIED PHYSICS LETTERS
Volume 80, Issue 13, Pages 2398-2400Publisher
AIP Publishing
DOI: 10.1063/1.1465128
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We describe a method to fabricate atomic-scale gaps and contacts between two metal electrodes. The method uses a directional electrodeposition process and has a built-in self-termination mechanism. The final gap width and contact size are preset by an external resistor (R-ext) that is connected in series to one of the electrodes. If 1/R-ext is chosen to be much smaller than the conductance quantum (G(0)=2e(2)/h), a small gap with conductance determined by electron tunneling is formed. If 1/R-ext is comparable or greater than G(0), a contact with conductance near a multiple of G(0) is fabricated. (C) 2002 American Institute of Physics.
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