Free-electron Model for Mesoscopic Force Fluctuations in Nanowires

Details Free-electron Model for Mesoscopic Force Fluctuations in Nanowires Free-electron Model for Mesoscopic Force Fluctuations in Nanowires

1997-11-21

arxiv.org/abs/cond-mat/9711219v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, reference corrected

Scientific paper

10.1103/PhysRevB.57.8830

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.

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