Low Temperature Physics: 38, 273 (2012); https://doi.org/10.1063/1.3699628 (10 pages)
Физика Низких Температур: Том 38, Выпуск 4 (Апрель 2012), c. 348-359    ( к оглавлению , назад )

Nanoelectromechanics of superconducting weak links (Review Article)

A.V. Parafilo1, I.V. Krive1,2,3, R.I. Shekhter2, and M. Jonson2,4,5

1B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: parafilo_sand@mail.ru

2Department of Physics, University of Gothenburg, SE-412 96 Göteborg, Sweden

3Physical Department, V.N. Karazin National University, Kharkov 61077, Ukraine

4SUPA, Department of Physics, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK

5Department of Physics, Division of Quantum Phases and Devices, Konkuk University, Seoul 143-701, Korea

Received December 23, 2011


Nanoelectromechanical effects in superconducting weak links are considered. Three different superconducting devices are studied: (i) a single-Cooper-pair transistor, (ii) a transparent SNS junction, and (iii) a single-level quantum dot coupled to superconducting electrodes. The electromechanical coupling is due to electrostatic or magnetomotive forces acting on a movable part of the device. It is demonstrated that depending on the frequency of mechanical vibrations the electromechanical coupling could either suppress or enhance the Josephson current. Nonequilibrium effects associated with cooling of the vibrational subsystem or pumping energy into it at low bias voltages are discussed.

PACS: 85.85.+j Micro- and nano-electromechanical systems (MEMS/NEMS) and devices;
PACS: 73.23.–b Electronic transport in mesoscopic systems;
PACS: 74.50.+r Tunneling phenomena; Josephson effects;
PACS: 74.45.+c Proximity effects; Andreev reflection; SN and SNS junctions.

Ключевые слова: nanoelectromechanics, single-Cooper-pair box, short SNS junction, quantum dot.