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Bistability and hysteresis in the sliding friction of a dimer

By Sebastian Goncalves, C. Fusco, A. R. Bishop and V. M. Kenkre


The sliding friction of a dimer moving over a periodic substrate and subjected to an external force is studied in the steady state for arbitrary temperatures within a one-dimensional model. Nonlinear phenomena that emerge include dynamic bistability and hysteresis, and can be related to earlier observations for extended systems such as the Frenkel-Kontorova model. Several observed features can be satisfactorily explained in terms of the resonance of a driven-damped nonlinear oscillator. Increasing temperature tends to lower the resonant peak and wash out the hysteresis

Topics: Fisica da materia condensada, Histerese, Atrito cinético
Year: 2014
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