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Suppression of stochastic fluctuations of suspended nanowires by temperature-induced electronic tunneling | | F. Santandrea
; L. Y. Gorelik
; R. I. Shekhter
; M. Jonson
; | | Date: |
9 May 2011 | | Abstract: | We investigate theoretically 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 find 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 equilibrium. | | Source: | arXiv, 1105.1738 | | Services: | Forum | Review | PDF | Favorites | |
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