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


nanotube device

single-electron tunneling



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 (EU) (EC/FP7/233992), 2009-09-01 -- 2012-08-31.


Den kondenserade materiens fysik



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