Dynamics of a penta-hepta defect in a hexagonal pattern |
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Authors: | Tam Ohata Wu |
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Institution: | Department of Physics, Occidental College, Los Angeles, California 90041, USA. |
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Abstract: | The structure and dynamics of a penta-hepta defect in a hexagonal pattern are studied experimentally. The hexagonal pattern is formed by placing a layer of soap bubbles (diameter approximately 1 mm) on a flat glass plate. We find that an isolated penta-hepta defect in a bubble raft with free boundary always moves along the direction perpendicular to the wave vector of the nonsingular mode and towards the nearest boundary. The structure of the penta-hepta defect is found to be similar to that found in nonequilibrium pattern forming systems. |
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