%0 Journal Article
%T Unusual synchronization phenomena during electrodissolution of silicon: the role of nonlinear global coupling
%A Lennart Schmidt
%A Konrad Sch£¿nleber
%A Vladimir Garc¨ªa-Morales
%A Katharina Krischer
%J Physics
%D 2014
%I arXiv
%X The photoelectrodissolution of n-type silicon constitutes a convenient model system to study the nonlinear dynamics of oscillatory media. On the silicon surface, a silicon oxide layer forms. In the lateral direction, the thickness of this layer is not uniform. Rather, several spatio-temporal patterns in the oxide layer emerge spontaneously, ranging from cluster patterns and turbulence to quite peculiar dynamics like chimera states. Introducing a nonlinear global coupling in the complex Ginzburg-Landau equation allows us to identify this nonlinear coupling as the essential ingredient to describe the patterns found in the experiments. The nonlinear global coupling is designed in such a way, as to capture an important, experimentally observed feature: the spatially averaged oxide-layer thickness shows nearly harmonic oscillations. Simulations of the modified complex Ginzburg-Landau equation capture the experimental dynamics very well.
%U http://arxiv.org/abs/1405.0414v1