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Kondo force in shuttling devices: dynamical probe for a Kondo cloud.
M N Kiselev1, K A Kikoin, L Y Gorelik
1The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, I-34151 Trieste, Italy.
Physical Review Letters
|February 26, 2013
Summary
This study reveals that Kondo tunneling in a single-electronic device exponentially amplifies nanoelectromechanical (NEM) coupling. This phenomenon offers enhanced sensitivity for detecting mechanical displacement and tunability of mechanical dissipation.
Area of Science:
- Physics
- Quantum Mechanics
- Nanotechnology
Background:
- Single-electronic devices with movable quantum dots offer unique electromechanical properties.
- Kondo tunneling is a quantum mechanical phenomenon relevant to electron transport in nanostructures.
Purpose of the Study:
- To investigate the electromechanical properties of a single-electronic device with a quantum dot on a vibrating cantilever.
- To explore the impact of Kondo tunneling on nanoelectromechanical (NEM) coupling.
Main Methods:
- Theoretical analysis of a device comprising a movable quantum dot, vibrating cantilever, and source electrode.
- Modeling electron tunneling and its interaction with mechanical motion.
Main Results:
- Resonance Kondo tunneling exponentially amplifies NEM coupling strength.
- The device exhibits insensitivity to mesoscopic fluctuations in nanodot electronic levels.
- Kondo-NEM phenomenon provides insights into retardation effects in many-particle cloud formation.
Conclusions:
- The Kondo-NEM phenomenon enhances nanoelectromechanical coupling significantly.
- This system allows for superhigh tunability of mechanical dissipation.
- Supersensitive detection of mechanical displacement is achievable using this device.
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