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arXiv · 1802.04509

Analytic understanding and control of dynamical friction

Emanuele Panizon·Giuseppe E. Santoro·Erio Tosatti·Gabriele Riva·Nicola Manini
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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.

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Emanuele Panizon, Giuseppe E. Santoro, Erio Tosatti, Gabriele Riva, Nicola Manini. 2018-02-13. Analytic understanding and control of dynamical friction. https://doi.org/10.1103/physrevb.97.104104

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