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

Författare och institution:
Fabio Santandrea (Institutionen för fysik (GU)); Leonid Y. Gorelik (Institutionen för teknisk fysik, Kondenserade materiens teori, Chalmers); Robert I. Shekhter (Institutionen för fysik (GU)); Mats Jonson (Institutionen för fysik (GU))
Publicerad i:
New Journal of Physics, 13 ( 10 ) s. 103017
Artikel, refereegranskad vetenskaplig
Fulltextlänk (lokalt arkiv):
Sammanfattning (abstract):
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.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Fysik ->
Den kondenserade materiens fysik ->
Mesoskopisk fysik
Coulomb blockade, single-electron tunneling, nanotube device, STM, NEMS
Quantum nanoelectromechanical systems (QNEMS) (EC/FP7/233992) Mer information
Postens nummer:
Posten skapad:
2011-10-18 08:02
Posten ändrad:
2011-12-15 10:03

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