2D Wigner Solid over Liquid Helium: Resonant and Non–Linear Phenomena

Author： Sivokon' V.   Dotsenko V.   Kovdrya Y.   Grigor'ev V.  

Publisher： Springer Publishing Company

ISSN： 0022-2291

Source： Journal of Low Temperature Physics, Vol.111, Iss.3-4, 1998-05, pp. : 609-614

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Abstract

Results are presented of an experimental study of coupled phonon–ripplon resonances in the Wigner crystal over a liquid helium surface in high driving fields. The resonant frequencies are shown to be in a good agreement with existing theoretical results in the limit of low exciting signal. Novel additional resonances appear at low frequencies for high driving fields. The mobility of the Wigner crystal at fixed frequency, measured as a function of driving field, is essentially nonmonotonic showing a mobility jump in high enough driving fields.

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