Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2007-07-20
Physics
Condensed Matter
Soft Condensed Matter
4 pages text and 3 figures
Scientific paper
10.1103/PhysRevLett.99.166102
We analyze an advanced two-spring model with an ultra-low effective tip mass to predict nontrivial and physically rich 'fine structure' in the atomic stick-slip motion in Friction Force Microscopy (FFM) experiments. We demonstrate that this fine structure is present in recent, puzzling experiments. This shows that the tip apex can be completely or partially delocalized, thus shedding new light on what is measured in FFM and, possibly, what can happen with the asperities that establish the contact between macroscopic sliding bodies.
Ábel Dániel
Frenken Joost J. W. M.
Krylov Sergey Yu
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