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arXiv · 1204.5020

Dynamics of a suspended nanowire driven by an ac Josephson current in an inhomogeneous magnetic field

Milton E. Peña-Aza
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Abstract

We consider a voltage-biased nanoelectromechanical Josephson junction, where a suspended nanowire forms a superconducting weak-link, in an inhomogeneous magnetic field. We show that a nonlinear coupling between the Josephson current and the magnetic field generates a Laplace force that induces a whirling motion of the nanowire. By performing an analytical and a numerical analysis, we demonstrate that at resonance, the amplitude-phase dynamics of the whirling movement present different regimes depending on the degree of inhomogeneity of the magnetic field: time independent, periodic and chaotic. Transitions between these regimes are also discussed.

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Milton E. Peña-Aza. 2012-04-23. Dynamics of a suspended nanowire driven by an ac Josephson current in an inhomogeneous magnetic field. https://doi.org/10.1103/physreve.86.046208

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