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Mechanical Sciences An open-access journal for theoretical and applied mechanics

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Mech. Sci., 8, 111-115, 2017
https://doi.org/10.5194/ms-8-111-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
12 May 2017
A two-dimensional electron gas sensing motion of a nanomechanical cantilever
Andrey Shevyrin1,2 and Arthur Pogosov1,2 1Rzhanov Institute of Semiconductor Physics SB RAS, Novosibirsk 630090, Russia
2Novosibirsk State University, Novosibirsk 630090, Russia
Abstract. A quantitative physical model, describing the piezoelectric electromechanical coupling in nanomechanical resonators with a two-dimensional electron gas, is developed. Numerical calculations of the change in density of a two-dimensional electron gas contained in a vibrating cantilever are performed using the model and are shown to be consistent with the experiment. The obtained data show that the vibration-induced electron density modulation is localized near the clamping point and that it is related to a rapid spatial change in the mechanical stress near this point. It is shown that details of the clamping geometry significantly affect the magnitude of the effect.

Citation: Shevyrin, A. and Pogosov, A.: A two-dimensional electron gas sensing motion of a nanomechanical cantilever, Mech. Sci., 8, 111-115, https://doi.org/10.5194/ms-8-111-2017, 2017.
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Short summary
The low-dimensional electron systems made from semiconductor heterostructures are known mostly as a base for studying the mesoscopic electron-transport phenomena. However, they can also be used for creation of nanoelectromechanical systems combining non-trivial electron transport and mechanical degrees of freedom. In the present paper, we propose a quantitative physical model describing the piezoelectric electromechanical coupling in nanomechanical resonators with a two-dimensional electron gas.
The low-dimensional electron systems made from semiconductor heterostructures are known mostly...
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