Discrete breathers in nonlinear magnetic metamaterials

Details Discrete breathers in nonlinear magnetic metamaterials Discrete breathers in nonlinear magnetic metamaterials

2006-05-29

arxiv.org/abs/cond-mat/0605674v2

Phys. Rev. Lett. 97, 157406 (2006)

Physics

Condensed Matter

Materials Science

4 pages, 6 figures, Physical Review Letters, accepted

Scientific paper

10.1103/PhysRevLett.97.157406

Magnetic metamaterials composed of split-ring resonators or $U-$type elements may exhibit discreteness effects in THz and optical frequencies due to weak coupling. We consider a model one-dimensional metamaterial formed by a discrete array of nonlinear split-ring resonators with each ring interacting with its nearest neighbours. On-site nonlinearity and weak coupling among the individual array elements result in the appearence of discrete breather excitations or intrinsic localized modes, both in the energy-conserved and the dissipative system. We analyze discrete single and multibreather excitations, as well as a special breather configuration forming a magnetization domain wall and investigate their mobility and the magnetic properties their presence induces in the system.

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