Differential Charge Sensing and Charge Delocalization in a Tunable Double Quantum Dot

Details Differential Charge Sensing and Charge Delocalization in a Tunable Double Quantum Dot Differential Charge Sensing and Charge Delocalization in a Tunable Double Quantum Dot

2003-11-13

arxiv.org/abs/cond-mat/0311308v4

Phys. Rev. Lett. 92, 226801 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

related papers at http://marcuslab.harvard.edu

Scientific paper

10.1103/PhysRevLett.92.226801

We report measurements of a tunable double quantum dot, operating in the quantum regime, with integrated local charge sensors. The spatial resolution of the sensors is sufficient to allow the charge distribution within the double dot system to be resolved at fixed total charge. We use this readout scheme to investigate charge delocalization as a function of temperature and strength of tunnel coupling, showing that local charge sensing allows an accurate determination of interdot tunnel coupling in the absence of transport.

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