S. Blom, H. Olin, J. L. Costa-Kramer, N. Garcia, M. Jonson, P. A. Serena, R. I. Shekhter
Published 1997-11-21, updated 1997-11-24Version 2
When two metal electrodes are separated, a nanometer sized wire (nanowire) is formed just before the contact breaks. The electrical conduction measured during this retraction process shows signs of quantized conductance in units of G_0=2e^2/h. Recent experiments show that the force acting on the wire during separation fluctuates, which has been interpreted as being due to atomic rearrangements. In this report we use a simple free electron model, for two simple geometries, and show that the electronic contribution to the force fluctuations is comparable to the experimentally found values, about 2 nN.
Comments: 4 pages, 3 figures, reference corrected
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