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Spontaneously Symmetry-Broken Current in Coupled Nanomechanical Shuttles

Kang-Hun Ahn·Hee Chul Park·Jan Wiersig·Jongbae Hong
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Abstract

We investigate the transport and the dynamical properties of tunnel-coupled double charge shuttles. The oscillation frequencies of two shuttles are mode-locked to integer multiples of the applied voltage frequency $ω$. We show that left/right-symmetric double shuttles may generate direct net current due to bistable motions caused by parametric instability. The symmetry-broken direct current appears near $ω=Ω_{0}/(2j-1)$, ($j=1,2,...$), where $Ω_{0}$ is the dressed resonance frequency of the relative motion of the two shuttles.

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Kang-Hun Ahn, Hee Chul Park, Jan Wiersig, Jongbae Hong. 2006-10-11. Spontaneously Symmetry-Broken Current in Coupled Nanomechanical Shuttles. https://arxiv.org/abs/cond-mat/0610287

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