Data di Pubblicazione:
2018
Citazione:
Analytic understanding and control of dynamical friction / E. Panizon, G.E. Santoro, E. Tosatti, G. Riva, N. Manini. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 97:10(2018), pp. 104104.1-104104.10. [10.1103/PhysRevB.97.104104]
Abstract:
Recent model simulations discovered unexpected nonmonotonic features in the wear-free dry phononic friction as a function of the sliding speed. Here we demonstrate that a rather straightforward application of linear-response theory, appropriate in a regime of weak slider-substrate interaction, predicts frictional one-phonon singularities which imply a nontrivial 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.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Electronic, Optical and Magnetic Materials; Condensed Matter Physics
Elenco autori:
E. Panizon, G.E. Santoro, E. Tosatti, G. Riva, N. Manini
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