Cooling of a suspended nanowire by an ac Josephson current flow
Journal article, 2010

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.

Author

Gustav Sonne

University of Gothenburg

Milton Eduardo Peña-Aza

University of Gothenburg

Leonid Gorelik

Chalmers, Applied Physics, Condensed Matter Theory

Robert I. Shekhter

University of Gothenburg

Mats Jonson

University of Gothenburg

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 104 22 226802 (4 pages)-

Subject Categories

Condensed Matter Physics

DOI

10.1103/PhysRevLett.104.226802

More information

Created

10/7/2017