ELFT HÍRADÓ

[StatFizSzeminar <statfiz AT glu.elte.hu>]

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                    ELTE TTK Fizikai Intézet
                STATISZTIKUS FIZIKAI SZEMINÁRIUM
                  

                      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
                              2.54

                             honlap:
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