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Nanoelectromechanical Heat Engine Based on Electron-Electron Interaction.
A Vikström1, A M Eriksson1, S I Kulinich2
1Department of Physics, Chalmers University of Technology, Kemigården 1, SE-412 96 Göteborg, Sweden.
Physical Review Letters
|December 24, 2016
Summary
A novel nanoelectromechanical system actuation mechanism uses heat flow, not electric current, via electron-electron interactions. This heat-driven system offers a new pathway for nanoelectromechanical device operation and study.
Area of Science:
- Solid State Physics
- Nanotechnology
- Thermodynamics
Background:
- Nanoelectromechanical systems (NEMS) typically rely on electrical or magnetic fields for actuation.
- Existing NEMS actuation mechanisms often involve electronic current or external alternating fields.
- A need exists for alternative, potentially more efficient, actuation methods in NEMS.
Purpose of the Study:
- To theoretically demonstrate mechanical actuation of a nanoelectromechanical system using heat flow.
- To explore a novel actuation mechanism based on electron-electron interactions and deflection-dependent tunneling.
- To establish the feasibility of such a system as a nanoelectromechanical heat engine.
Main Methods:
- Theoretical analysis of a nanoelectromechanical system subjected to heat flow.
- Modeling of electron-electron interactions mediating heat transfer.
- Derivation of criteria for mechanical instability and oscillation amplitude estimation.
Main Results:
- Demonstration of mechanical actuation solely by heat flow via electron-electron interaction.
- Identification of deflection-dependent tunneling rates as a key mechanism.
- Establishment of a criterion for mechanical instability leading to self-sustained oscillations.
Conclusions:
- A new mechanism for mechanical actuation in nanoelectromechanical systems driven by heat flow is theoretically proposed.
- The proposed system functions as a nanoelectromechanical heat engine, distinct from current-driven devices.
- The phenomenon is theoretically predicted to be observable with current experimental techniques.
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