Readout of carbon nanotube vibrations based on spin-phonon coupling

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-...

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Veröffentlicht in:Applied physics letters 2012-04, Vol.100 (14), p.143103-143103-4
Hauptverfasser: Ohm, C., Stampfer, C., Splettstoesser, J., Wegewijs, M. R.
Format: Artikel
Sprache:eng
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Zusammenfassung: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3698395