Cooling of a suspended nanowire by an ac Josephson current flow

Gustav Sonne, Milton E. Peña-Aza, Leonid Y. Gorelik, Robert I. Shekhter, Mats Jonson

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31 Citations (Scopus)

Abstract

We consider a nanoelectromechanical Josephson junction, where a suspended nanowire serves as a superconducting weak link, and show that an applied dc bias voltage can result in suppression of the flexural vibrations of the wire. This cooling effect is achieved through the transfer of vibronic energy quanta first to voltage-driven Andreev states and then to extended quasiparticle electronic states. Our analysis, which is performed for a nanowire in the form of a metallic carbon nanotube and in the framework of the density matrix formalism, shows that such self-cooling is possible down to the ground state of the flexural vibration mode of the nanowire. © 2010 The American Physical Society.

Original languageEnglish
Article number226802
JournalPhysical Review Letters
Volume104
Issue number22
DOIs
Publication statusPublished - 1 Jun 2010

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    Sonne, G., Peña-Aza, M. E., Gorelik, L. Y., Shekhter, R. I., & Jonson, M. (2010). Cooling of a suspended nanowire by an ac Josephson current flow. Physical Review Letters, 104(22), [226802]. https://doi.org/10.1103/PhysRevLett.104.226802