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The problem of critical damping in nanofriction

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Abstract

The progress that has been made in describing atomic friction in terms of mechanical instabilities of the stick-slip type masks the role of damping and makes researchers ignore the true mechanisms of dissipation. This study shows that there is a necessary condition for the realization of regular stick-slips occurring with atomic periodicity, which are observed in friction force microscopy (a variant of atomic force microscopy) experiments. This condition lies in the existence of a direct relation between the rate of dissipation and the characteristic frequency of a measuring system, i.e., its stiffness and mass (“critical damping”). The conclusion seems to be paradoxical; it indicates a nontrivial dissipation mechanism, which, according to the proposed explanation, essentially depends on memory effects.

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Authors and Affiliations

  1. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071, Russia

    S. Yu. Krylov

  2. Kamerlingh Onnes Laboratory, Leiden University, 2300 RA, Leiden, Netherlands

    J. W. M. Frenken

Authors
  1. S. Yu. Krylov
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  2. J. W. M. Frenken
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Original Russian Text © S.Yu. Krylov, J.W.M. Frenken, 2012, published in Kolloidnyi Zhurnal, 2012, Vol. 74, No. 5, pp. 593–596.

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Krylov, S.Y., Frenken, J.W.M. The problem of critical damping in nanofriction. Colloid J 74, 569–572 (2012). https://doi.org/10.1134/S1061933X12050067

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  • DOI: https://doi.org/10.1134/S1061933X12050067

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