Suppression of the stochastic fluctuations of suspended nanowires by temperature-induced single-electron tunneling
Artikel i vetenskaplig tidskrift, 2011

We theoretically investigate the electromechanical properties of freely suspended nanowires that are in tunneling contact with the tip of a scanning tunneling microscope (STM) and two supporting metallic leads. The aim of our analysis is to characterize the fluctuations of the dynamical variables of the nanowire when a temperature drop is maintained between the STM tip and the leads, which are all assumed to be electrically grounded. By solving a quantum master equation that describes the coupled dynamics of electronic and mechanical degrees of freedom, we found that the stationary state of the mechanical oscillator has a Gaussian character, but that the amplitude of its root-mean square center-of-mass fluctuations is smaller than would be expected if the system were coupled only to the leads at thermal equilibrium.

Coulomb blockade

single-electron tunneling

STM

NEMS

nanotube device

Författare

Fabio Santandrea

Göteborgs universitet

Leonid Gorelik

Chalmers, Teknisk fysik, Kondenserade materiens teori

Robert I. Shekhter

Göteborgs universitet

Mats Jonson

Göteborgs universitet

New Journal of Physics

1367-2630 (ISSN)

Vol. 13 10 103017- 103017

Quantum Nanoelectromechanical Systems (QNEMS)

Europeiska kommissionen (FP7), 2009-09-01 -- 2012-08-31.

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1088/1367-2630/13/10/103017

Mer information

Skapat

2017-10-06