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Updated: May 26, 2026
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All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Spin-controlled nanomechanics induced by single-electron tunneling
D Radić1, A Nordenfelt, A M Kadigrobov
1Department of Applied Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.
Physical Review Letters
|December 21, 2011
Summary
We found that electrical current in a nanowire can excite mechanical vibrations through magnetomotive coupling. This occurs due to correlations between electronic energy levels and the nanowire
Area of Science:
- Condensed matter physics
- Nanotechnology
- Quantum mechanics
Background:
- Understanding electronic transport in nanostructures is crucial.
- The interplay between electrical, mechanical, and magnetic properties in nanowires is of significant interest.
Purpose of the Study:
- To investigate the phenomenon of self-excited mechanical vibrations in a nanowire.
- To explore the role of magnetomotive coupling in dc-electronic transport.
- To determine the conditions for instability and stable oscillation regimes.
Main Methods:
- Theoretical analysis of dc-electronic transport.
- Modeling of magnetomotive coupling between current and nanowire vibrations.
- Derivation of conditions for self-excitation of mechanical vibrations.
Main Results:
- Demonstrated that magnetomotive coupling can lead to self-excitation of mechanical vibrations.
- Identified a mechanism based on correlations between electronic energy level occupancy and nanowire velocity.
- Derived conditions for the onset of instability and identified stable oscillation regimes.
Conclusions:
- Self-excited mechanical vibrations are possible in nanowires under specific conditions.
- The study provides a theoretical framework for understanding electromechanical instabilities in nanodevices.
- Findings could inform the design of novel nanoelectromechanical systems.
