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1 article(s) from Riva, Gabriele

Velocity dependence of sliding friction on a crystalline surface

Christian Apostoli,
Giovanni Giusti,
Jacopo Ciccoianni,
Gabriele Riva,
Rosario Capozza,
Rosalie Laure Woulaché,
Andrea Vanossi,
Emanuele Panizon and
Nicola Manini

Beilstein J. Nanotechnol. 2017, 8, 2186–2199, doi:10.3762/bjnano.8.218

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Figure 1: A sketch of the 1D slider-substrate model. The large sphere represents the slider, which moves alon...

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Figure 2: The potential-energy profile experienced by the slider as it moves along a hypothetical chain with ...

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Figure 3: The time dependence (a) and (b) of the slider velocity v_SL and (c) of the chain center of mass v_CM ...

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Figure 4: The dynamical friction force as a function of the damping coefficient γ that fixes the (unphysical)...

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Figure 5: Three snapshots of the instantaneous velocities of a few chain atoms as a function of their positio...

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Figure 6: Dynamic friction force as a function of the slider speed v_SL. For comparison, the horizontal dashed...

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Figure 7: (a): A snapshot of the velocities of the chain particles while the slider, instantly at the vertica...

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Figure 8: The square modulus of the Fourier transforms of the velocities v_j(t), at six subsequent times. Here...

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Figure 9: The time-averaged square modulus of the Fourier transform of the chain velocities, for a few charac...

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Figure 10: The positions (a) and heights (b) of the peaks of [Graphic 31] as functions of v_SL. Panels (c) and (d): detail ...

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Figure 11: A direct comparison of the peak wave vectors of [Graphic 34] , with the dynamic friction F_d as a function of v_SL...

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Figure 12: A scheme of the steps performed to identify the phonons whose phase velocity equals v_SL, and the co...

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Figure 13: The positions of the observed peaks of [Graphic 40] (symbols), compared with the values of k of the phonons who...

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Figure 14: (a): The motion of the slider (solid line) as it is pulled by a spring having elastic constant K_pull...

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Figure 15: For smaller and smaller support velocity v_pull, the maximum elastic force experienced by the slider...

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Full Research Paper

Published 19 Oct 2017

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