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

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 whi...

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Bibliographic Details
Published in:arXiv.org 2012-04
Main Author: Peña-Aza, Milton E
Format: Article
Language:English
Subjects:
Alternating current
Inhomogeneity
Josephson junctions
Magnetic fields
Nanowires
Numerical analysis
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1204.5020