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arXiv · 1105.1738

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

F. Santandrea·L. Y. Gorelik·R. I. Shekhter·M. Jonson
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Abstract

We investigate theoretically the electromechanical properties of freely suspended nanowires that are in tunnelling contact with the tip of a scanning tunnelling 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 mantained 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 at thermal equilibrium.

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F. Santandrea, L. Y. Gorelik, R. I. Shekhter, M. Jonson. 2011-10-17. Suppression of stochastic fluctuations of suspended nanowires by temperature-induced single-electron tunnelling. https://doi.org/10.1088/1367-2630%2F13%2F10%2F103017

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