Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2005-02-21
Phys. Rev. B 71, 045413 (2005)
Physics
Condensed Matter
Other Condensed Matter
10 pages, 13 figures
Scientific paper
10.1103/PhysRevB.71.045413
We present a comparative analysis of the velocity dependence of atomic-scale friction for the Tomlinson model, at zero and finite temperatures, in 1D and 2D, and for different values of the damping. Combining analytical arguments with numerical simulations, we show that an appreciable velocity dependence of the kinetic friction force $F_{fric}$, for small scanning velocities $v_s$ (from 1 nm/s to 2 $\mu$m/s), is inherent in the Tomlinson model. In the absence of thermal fluctuations in the stick-slip regime, it has the form of a power-law, $F_{fric}-F_0\propto v_s^{\beta}$ with $\beta=2/3$, irrespective of dimensionality and value of the damping. Since thermal fluctuations enhance the velocity dependence of friction, we provide guidelines to establish when thermal effects are important and to which extent the surface corrugation affects the velocity dependence.
Fasolino Annalisa
Fusco Claudio
No associations
LandOfFree
Velocity dependence of atomic-scale friction: a comparative study of the one- and two-dimensional Tomlinson model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Velocity dependence of atomic-scale friction: a comparative study of the one- and two-dimensional Tomlinson model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Velocity dependence of atomic-scale friction: a comparative study of the one- and two-dimensional Tomlinson model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-197357