Electronic Aharonov-Bohm effect induced by quantum vibrations.
Mechanical displacements of a nanoelectromechanical system shift the electron trajectories and hence perturb phase coherent charge transport through the device. We show theoretically that in the presence of a magnetic field 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.
Shekhter
R I
RI
Department of Physics, Göteborg University, SE-412 96 Göteborg, Sweden.
Gorelik
L Y
LY
Glazman
L I
LI
Jonson
M
M