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We extend the study of velocity quantization phenomena recently found in the classical motion of an idealized 1D model solid lubricant – consisting of a harmonic chain interposed between two periodic sliding potentials [Phys. Rev. Lett. 97, 056101 (2006)]. This quantization is due to one slider rigidly dragging the commensurate lattice of kinks that the… (More)

In this work we study a generalized Frenkel-Kontorova friction model with two sliding periodic substrate potentials acting on a harmonic chain representing the lubricant. We compare the dynamics of the lubricant applying different boundary conditions: periodic, representing an infinite chain, and open, simulating a lubricant of finite size, such as a… (More)

We analyze in some detail the recently discovered velocity quantization phenomena in the classical motion of an idealized one-dimensional solid lubricant, consisting of a harmonic chain interposed between two periodic sliders. The ratio w = vcm/vext of the chain center-of-mass velocity to the externally imposed relative velocity of the sliders is pinned to… (More)

- Nicola Manini, Marco Cesaratto, Mario G Del Pópolo, Pietro Ballone
- The journal of physical chemistry. B
- 2009

Computer simulations of (i) a [C(12)mim][Tf(2)N] film of nanometric thickness squeezed at kbar pressure by a piecewise parabolic confining potential reveal a mesoscopic in-plane density and composition modulation reminiscent of mesophases seen in 3D samples of the same room-temperature ionic liquid (RTIL). Near 2D confinement, enforced by a high normal… (More)

We report a surprising hysteretic behavior in the dynamics of a simple one-dimensional nonlinear model inspired by the tribological problem of two sliding surfaces with a thin solid lubricant layer in between. In particular, we consider the frictional dynamics of a harmonic chain confined between two rigid incommensurate substrates which slide with a fixed… (More)

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