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Suppression of the stochastic fluctuations of suspended nanowires by temperature-induced single-electron tunneling

Fabio Santandrea ; Leonid Y. Gorelik (Institutionen för teknisk fysik, Kondenserade materiens teori) ; Robert I. Shekhter ; Mats Jonson
New Journal of Physics (1367-2630). Vol. 13 (2011), 10, p. 103017.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Coulomb blockade, single-electron tunneling, nanotube device, STM, NEMS

Denna post skapades 2011-10-18. Senast ändrad 2011-12-15.
CPL Pubid: 147345


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Institutioner (Chalmers)

Institutionen för fysik (GU) (GU)
Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)


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Denna publikation är ett resultat av följande projekt:

Quantum nanoelectromechanical systems (QNEMS) (EC/FP7/233992)