Direct control of the tunnel splitting in a one-electron double quantum dot

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Quasi-static transport measurements are employed on a laterally defined tunnel-coupled double quantum dot. A nearby quantum point contact allows us to track the charge as added to the device. If charged with only up to one electron, the low-energy spectrum of the double quantum dot is characterized by its quantum mechanical interdot tunnel splitting. We directly measure its magnitude by utilizing particular anticrossing features in the stability diagram at finite source-drain bias. By modification of gate voltages defining the confinement potential as well as by variation of a perpendicular magnetic field we demonstrate the tunability of the coherent tunnel coupling.
High resolution pdf file available at http://www2.nano.physik.uni-muenchen.de/~huettel/research/anticrossing.pdf

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/25606

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0501012
 http://arxiv.org/abs/cond-mat/0501012
 Physical Review B 72, 081310(R) (2005)
 doi:10.1103/PhysRevB.72.081310

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arXiv