Peter Reimann and Mykhaylo Evstigneev 2005 New J. Phys. 7 25 doi:10.1088/1367-2630/7/1/025
Description of atomic friction as forced Brownian motion
Focus on Brownian Motion and Diffusion in the 21st CenturyPeter Reimann and Mykhaylo Evstigneev
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A theoretical description of friction force microscopy experiments in terms of a forced Brownian motion model is derived on the basis of microscopic considerations. Particular emphasis is put on the discussion of the relevant state variables/collective coordinates and on a realistic description of dissipation and inertia effects by means of comparison with experimental findings. The main new prediction of the model is a non-monotonic dependence of the friction force upon the pulling velocity of the AFM-tip relative to an atomically flat surface. The region around the force maximum can be approximately described by a universal scaling law and should be observable under experimentally realistic conditions.
- PACS
- Subjects
- Dates
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Issue 1 (January 2005)
Received 31 August 2004
Published 31 January 2005
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Description of atomic friction as forced Brownian motion
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