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Research
Projects:
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Collab.:
M.I. Haftel (NRL, Whasington
DC, USA).
Oscillatory forcing has been a
longstanding source of intriguing
nonlinear phenomena, such as the
inverted pendulum problem, the Faraday
instability in fluid mechanics, and
pattern formation in vibrated granular
media.
We show
that the oscillatory driving of
crystal surfaces can induce
nanostructure formation or
smoothening. The oscillating driving
force can be of quite different origin
such as a pulsed laser beam, an
electric field, or sound waves. The
oscillatory force acts like a
non-equilibrium perturbation, which
couples to the surface anisotropy
leading to surface mass fluxes.
more
in slides
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Nanometer-scale mounds
formed
under temperature oscillations.
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