Cooling of a suspended nanowire by an ac Josephson current flow
Artikel i vetenskaplig tidskrift, 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.


Gustav Sonne

Göteborgs universitet

Milton Eduardo Peña-Aza

Göteborgs universitet

Leonid Gorelik

Chalmers, Teknisk fysik, Kondenserade materiens teori

Robert I. Shekhter

Göteborgs universitet

Mats Jonson

Göteborgs universitet

Physical Review Letters

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

Vol. 104 226802 (4 pages)-


Den kondenserade materiens fysik