Low Temperature Physics: 35, 662 (2009); https://doi.org/10.1063/1.3224725 (17 pages)
Физика Низких Температур: Том 35, Выпуск 8-9 (Август 2009), c. 841-861    ( к оглавлению , назад )

Nonequilibrium and quantum coherent phenomena in the electromechanics of suspended nanowires (Review Article)

Robert I. Shekhter, Fabio Santandrea, Gustav Sonne

Department of Physics, University of Gothenburg, SE-412 96 Göteborg, Sweden
E-mail: robert.shekhter@physics.gu.se

Leonid Y. Gorelik

Department of Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden

Mats Jonson*

Department of Physics, University of Gothenburg, SE-412 96 Göteborg, Sweden and School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK

Received February 26, 2009


Strong coupling between electronic and mechanical degrees of freedom is a basic requirement for the operation of any nanoelectromechanical device. In this Review we consider such devices and in particular investigate the properties of small tunnel-junction nanostructures that contain a movable element in the form of a suspended nanowire. In these systems, electrical currents and charge can be concentrated to small spatial volumes resulting in strong coupling between the mechanics and the charge transport. As a result, a variety of mesoscopic phenomena appear, which can be used for the transduction of electrical currents into mechanical operation. Here we will in particular consider nanoelectromechanical dynamics far from equilibrium and the effect of quantum coherence in both the electronic and mechanical degrees of freedom in the context of both normal and superconducting nanostructures.

PACS: 73.23.–b Electronic transport in mesoscopic system;
PACS: 74.50+r Tunneling phenom; point contacts, Josephson effects;
PACS: 73.63.Nm Quantum wires;
PACS: 85.85.+j Micro- and nanoelectromechanical systems.

Key words: Nanoelectromechanical systems, electromechanical shuttling, NEM coupling, quantum coherence, nonequilibrium dynamics, superconducting weak links.