Intrinsic localized modes in a nonlinear electrical lattice with saturable nonlinearity

This experimental study of driven intrinsic localized modes (ILMs) in an electronic circuit lattice with saturable nonlinearity follows the theoretical work of Had ievski and coworkers. They proposed that a saturable nonlinearity could introduce transition points where localized excitations in nonin...

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Bibliographic Details
Published in:Europhysics letters 2013-08, Vol.103 (3), p.30006
Main Authors: Shi, W., Shige, S., Soga, Y., Sato, M., Sievers, A. J.
Format: Article
Language:English
Subjects:
05.45.-a
05.45.Yv
63.20.Pw
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Summary:This experimental study of driven intrinsic localized modes (ILMs) in an electronic circuit lattice with saturable nonlinearity follows the theoretical work of Had ievski and coworkers. They proposed that a saturable nonlinearity could introduce transition points where localized excitations in nonintegrable lattices would move freely. In our experiments MOS capacitors provide the saturable nonlinearity in an electric lattice. Because of the soft nonlinearity driver locked, auto-resonance stationary ILMs are observed below the bottom of a linear frequency band of the lattice. With decreasing driver frequency the width of the ILM changes in a stepwise manner as does the softening of the barrier between site-centered and bond-centered ILM locations in agreement with theoretical expectations. However, the steps show hysteresis between up and down frequency scans and such hysteresis inhibits the free motion of ILMs.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/103/30006