Analytic understanding and control of dynamical friction
Abstract
Recent model simulations discovered unexpected non-monotonic features in the wear-free dry phononic friction as a function of the sliding speed. Here we demonstrate that a rather straight- forward application of linear-response theory, appropriate in a regime of weak slider-substrate in- teraction, predicts frictional one-phonon singularities which imply a non-trivial dependence of the dynamical friction force on the slider speed and/or coupling to the substrate. The explicit formula which we derive reproduces very accurately the classical atomistic simulations when available. By modifying the slider-substrate interaction the analytical understanding obtained provides a practical means to tailor and control the speed dependence of friction with substantial freedom.
Cite
@article{arxiv.1802.04509,
title = {Analytic understanding and control of dynamical friction},
author = {Emanuele Panizon and Giuseppe E. Santoro and Erio Tosatti and Gabriele Riva and Nicola Manini},
journal= {arXiv preprint arXiv:1802.04509},
year = {2018}
}