Electronic Aharonov-Bohm Effect Induced by Quantum Vibrations
Date: Wednesday, September 27, 2006 @ 22:25:46 UTC
Topic: Science
Authors: R. I. Shekhter, L. Y. Gorelik, L. I. Glazman, M. Jonson
Subj-class: Mesoscopic Systems and Quantum Hall Effect
Mechanical displacements of a nanoelectromechanical system (NEMS) shift the
electron trajectories and hence perturb phase coherent charge transport through
the device. We show theoretically that in the presence of a magnetic feld such
quantum-coherent displacements may give rise to an Aharonov-Bohm-type of
effect.
In particular, we demonstrate that quantum vibrations of a suspended
carbon nanotube result in a positive nanotube magnetoresistance, which
decreases slowly with the increase of temperature. This effect may enable one
to detect quantum displacement fluctuations of a nanomechanical device.
Link: http://arxiv.org/abs/cond-mat/0606437
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