Friction
We study the mechanisms for dissipation during the sliding
of two bodies against each other, namely the origin of friction
at an atomic scale.
Within this topic our aim is to understand the mechanisms for dissipation
of mechanical energy between incommensurate
contacting lattices. When two bodies come into contact commensurability between the atomic spacings is more the exception than the rule.
By means of numerical and analytical results we have shown
that transfer of translational energy from the center of mass to internal
vibrations (heat) occurs via a novel kind of
dissipative parametric resonances involving several resonant phonons
and we have established quantitative estimates for
their existence in finite systems.
Onset of sliding friction
in incommensurate systems L. Consoli, H. Knops and A. Fasolino,Phys. Rev. Lett. 85, 302 (2000)
Can aperiodicity cause superlubricity? L. Consoli, A. Fasolino, H. J. F. Knops, T. Janssen, proceedings Aperiodic 2000 , to appear in Ferroelectrics
Dynamics and friction at incommensurate contacting surfaces.
A. Fasolino*, L. Consoli, H.J.F. Knops proceedings ICCN 2001
Breakdown of a conservation law in incommensurate systems
L. Consoli, H.J.F. Knops, A. Fasolino Phys. Rev. E 64 , 016601 (2001)
Sliding on graphite
first simulation
stick-slip simulation, sideview
stick-slip simulation, topview
Phonons, localization
Pinning and phonon localization in Frenkel-Kontorova models
on quasiperiodic substrates
T. S. van Erp, A. Fasolino, O. Radulescu, T. Janssen
Phys. Rev. B 60 , 6522 (1999)
Structural transitions and phonon localization in Frenkel Kontorova
models with quasi-periodic potentials
T.S. van Erp, A. Fasolino, T. Janssen
proceedings, Aperiodic 2000 , to appear in Ferroelectrics
Ground state and phonon excitations in aperiodic crystals
L. A. Brussaard
, A. Fasolino, T. Janssen, proceedings
Aperiodic 2000 , to appear in Ferroelectrics
Phason mode in inclusion compounds
L.A. Brussaard, A. Fasolino, T. Janssen, to appear in Phys. Rev. B