Growth of Order in An Anisotropic Swift-Hohenberg Model

Details Growth of Order in An Anisotropic Swift-Hohenberg Model Growth of Order in An Anisotropic Swift-Hohenberg Model

2005-06-27

arxiv.org/abs/cond-mat/0506703v2

Physics

Condensed Matter

Soft Condensed Matter

17 pages, 14 figures

Scientific paper

10.1103/PhysRevE.73.036117

We have studied the ordering kinetics of a two-dimensional anisotropic Swift-Hohenberg (SH) model numerically. The defect structure for this model is simpler than for the isotropic SH model. One finds only dislocations in the aligned ordering striped system. The motion of these point defects is strongly influenced by the anisotropic nature of the system. We developed accurate numerical methods for following the trajectories of dislocations. This allows us to carry out a detailed statistical analysis of the dynamics of the dislocations. The average speeds for the motion of the dislocations in the two orthogonal directions obey power laws in time with different amplitudes but the same exponents. The position and velocity distribution functions are only weakly anisotropic.

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