Lack of Pinning for Rigid Sliding Monolayers in Microbalance Experiments

Details Lack of Pinning for Rigid Sliding Monolayers in Microbalance Experiments Lack of Pinning for Rigid Sliding Monolayers in Microbalance Experiments

2004-11-30

arxiv.org/abs/cond-mat/0411760v1

Physics

Condensed Matter

Materials Science

revtex, 3 1/2 pages, one figure

Scientific paper

Recent work on the dynamics of monolayers on a metallic substrate attached to a quartz oscillator has provided interesting data on kinetic friction at the microscopic level. Sliding of the film relative to the substrate is often observed even in situations in which theory seems to predict that the film should be pinned by substrate imperfections. In this letter we propose, in order to attempt to resolve this issue, that if the defect potentials have a range of a little more than an atomic spacing, the net forces on the film due to the defects are likely to be quite small due to cancellations.

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