We propose a scheme for spin-based detection of the bending motion in suspended carbon-nanotubes, using the curvature-induced spin-orbit interaction. We show that the resulting effective spin-phonon coupling can be used to down-convert the high-frequency vibration-modulated spin-orbit field to spin-flip processes at a much lower frequency. This vibration-induced spin-resonance can be controlled with an axial magnetic field. We propose a Pauli spin blockade readout scheme and predict that the leakage current shows pronounced peaks as a function of the external magnetic field. Whereas the resonant peaks allow for frequency readout, the slightly off-resonant current is sensitive to the vibration amplitude.
@article{arxiv.1110.5165,
title = {Readout of carbon nanotube vibrations based on spin-phonon coupling},
author = {Christoph Ohm and Christoph Stampfer and Janine Splettstoesser and Maarten R. Wegewijs},
journal= {arXiv preprint arXiv:1110.5165},
year = {2012}
}