Driven localized excitations in the acoustic spectrum of small nonlinear macroscopic and microscopic lattices

Details Driven localized excitations in the acoustic spectrum of small nonlinear macroscopic and microscopic lattices Driven localized excitations in the acoustic spectrum of small nonlinear macroscopic and microscopic lattices

2007-04-28

arxiv.org/abs/0704.3789v1

Nonlinear Sciences

Pattern Formation and Solitons

Physical Review Letters, accepted

Scientific paper

10.1103/PhysRevLett.98.214101

Both bright and dark traveling, locked, intrinsic localized modes (ILMs) have been generated with a spatially uniform driver at a frequency in the acoustic spectrum of a nonlinear micromechanical cantilever array. Complementary numerical simulations show that a minimum density of modes, hence array size, is required for the formation of such locked smoothly running excitations. Additional simulations on a small 1-D antiferromagnetic spin system are used to illustrate that such uniformly driven running ILMs should be a generic feature of a nanoscale atomic lattice.

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