TY - JOUR

T1 - Domain structures in fourth-order phase and Ginzburg-Landau equations

AU - Raitt, David

AU - Riecke, Hermann

N1 - Funding Information:
This work has been supported by grants from NSF/AFOSR (DMS-9020289, DMS-9304397) and DOE (DE-FG02-92ER14303). H.R. acknowledges interesting discussions with W. Pesch, L. Kramer, and E. Bodenschatz.

PY - 1995/4/1

Y1 - 1995/4/1

N2 - In pattern-forming systems, competition between patterns with different wave numbers can lead to domain structures, which consist of regions with differing wave numbers separated by domain walls. For domain structures well above threshold we employ the appropriate phase equation and obtain detailed qualitative agreement with recent experiments. Close to threshold a fourth-order Ginzburg-Landau equation is used which describes a steady bifurcation in systems with two competing critical wave numbers. The existence and stability regime of domain structures is found to be very intricate due to interactions with other modes. In contrast to the phase equation the Ginzburg-Landau equation allows a spatially oscillatory interaction of the domain walls. Thus, close to threshold domain structures need not undergo the coarsening dynamics found in the phase equation far above threshold, and can be stable even without phase conservation. We study their regime of stability as a function of their (quantized) length. Domain structures are related to zig-zags in two-dimensional systems. The latter are therefore expected to be stable only when quenched far enough beyond the zig-zag instability.

AB - In pattern-forming systems, competition between patterns with different wave numbers can lead to domain structures, which consist of regions with differing wave numbers separated by domain walls. For domain structures well above threshold we employ the appropriate phase equation and obtain detailed qualitative agreement with recent experiments. Close to threshold a fourth-order Ginzburg-Landau equation is used which describes a steady bifurcation in systems with two competing critical wave numbers. The existence and stability regime of domain structures is found to be very intricate due to interactions with other modes. In contrast to the phase equation the Ginzburg-Landau equation allows a spatially oscillatory interaction of the domain walls. Thus, close to threshold domain structures need not undergo the coarsening dynamics found in the phase equation far above threshold, and can be stable even without phase conservation. We study their regime of stability as a function of their (quantized) length. Domain structures are related to zig-zags in two-dimensional systems. The latter are therefore expected to be stable only when quenched far enough beyond the zig-zag instability.

UR - http://www.scopus.com/inward/record.url?scp=0002204458&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0002204458&partnerID=8YFLogxK

U2 - 10.1016/0167-2789(94)00218-F

DO - 10.1016/0167-2789(94)00218-F

M3 - Article

AN - SCOPUS:0002204458

VL - 82

SP - 79

EP - 94

JO - Physica D: Nonlinear Phenomena

JF - Physica D: Nonlinear Phenomena

SN - 0167-2789

IS - 1-2

ER -