Nonlinear response and discrete breather excitation in driven micro-mechanical cantilever arrays

Details Nonlinear response and discrete breather excitation in driven micro-mechanical cantilever arrays Nonlinear response and discrete breather excitation in driven micro-mechanical cantilever arrays

2005-04-12

arxiv.org/abs/cond-mat/0504298v1

Europhys. Lett. volume 74, page 452, 2006

Physics

Condensed Matter

Other Condensed Matter

4 pages, 5 figures

Scientific paper

10.1209/epl/i2005-10550-y

We explain the origin of the generation of discrete breathers (DBs) in experiments on damped and driven micromechanical cantilever arrays (M.Sato et al. Phys. Rev. Lett. {\bf 90}, 044102, 2003). Using the concept of the nonlinear response manifold (NLRM) we provide a systematic way to find the optimal parameter regime in damped and driven lattices where DBs exist. Our results show that DBs appear via a new instability of the NLRM different from the anticipated modulational instability (MI) known for conservative systems. We present several ways of exciting DBs, and compare also to experimental studies of exciting and destroying DBs in antiferromagnetic layered systems.

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