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  • From: StatFizSzeminar <statfiz AT>
  • To: fizinfo AT
  • Subject: [Fizinfo] Stat Fiz Szeminarium
  • Date: Sat, 21 Apr 2012 12:21:17 +0200
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  • List-id: ELFT HÍRADÓ <>

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ELTE TTK Fizikai Intézet

2012. április 25.
szerda 11 óra

Kirsten Martens

LPMCN Université Claude Bernard Lyon

"Nonlinear wavelength selection in surface
faceting under electromigration"

This talk is about the control of the faceting of crystal surfaces by
means of surface electromigration. When electromigration reinforces
the faceting instability, we find perpetual coarsening with a
wave-length increasing as a sqare root of time. For strongly
stabilizing electromigration, the surface is restabilized. For weakly
stabilizing electromigration, a celullar pattern is obtained, with a
nonlinearly selected wave-length. The dynamics is found to reach a
continuous family of stable non-equilibrium steady-states. As a
consequence, the nonlinear wavelength selection mechanism is not
caused by an instability of steady-states, as suggested by previous
works in the literature.

1117. Budapest, Pázmány P. sétány 1/A, Északi tömb


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