Khare, Avinash ; Saxena, Avadh (2006) Domain wall and periodic solutions of coupled φ4 models in an external field Journal of Mathematical Physics, 47 (9). 092902 _1-092902 _26. ISSN 0022-2488
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Official URL: http://jmp.aip.org/resource/1/jmapaq/v47/i9/p09290...
Related URL: http://dx.doi.org/10.1063/1.2345110
Abstract
Coupled double well (φ4) one-dimensional potentials abound in both condensed matter physics and field theory. Here we provide an exhaustive set of exact periodic solutions of a coupled φ4 model in an external field in terms of elliptic functions (domain wall arrays) and obtain single domain wall solutions in specific limits. We also calculate the energy and interaction between solitons for various solutions. Both topological and nontopological (e.g., some pulse-like solutions in the presence of a conjugate field) domain walls are obtained. We relate some of these solutions to the recently observed magnetic domain walls in certain multiferroic materials and also in the field theory context wherever possible. Discrete analogs of these coupled models, relevant for structural transitions on a lattice, are also considered.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Institute of Physics. |
Keywords: | Elliptic Equations; Solitons; Magnetic Domain Walls; phi4 Field Theory |
ID Code: | 83292 |
Deposited On: | 20 Feb 2012 06:34 |
Last Modified: | 20 Feb 2012 06:34 |
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