Large nuclear Overhauser fields detected in vertically-coupled double quantum dots

Details Large nuclear Overhauser fields detected in vertically-coupled double quantum dots Large nuclear Overhauser fields detected in vertically-coupled double quantum dots

2007-05-08

arxiv.org/abs/0705.1104v2

Phys. Rev. Lett. 99, 096804 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures, rev-tex. Improved presentation of figures 1-3, also added SEM image to figure 1. Minor changes to discussi

Scientific paper

10.1103/PhysRevLett.99.096804

We report the electrical induction and detection of dynamic nuclear
polarization in the spin-blockade regime of double GaAs vertical quantum dots.
The largest Overhauser field observed was about 4 Tesla, corresponding to a
nuclear polarization of about 40% in the present device. A phenomenological
model is presented to provide a qualitative understanding of our results.

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