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arXiv 2006-10-25 DOI 10.1103/PhysRevLett.98.036802 0 views

Energy Dependent Tunneling in a Quantum Dot

MacLean, K. · Amasha, S. · Radu, Iuliana P. · Zumbuhl, D. M. · Kastner, M. A. · Hanson, M. P. · Gossard, A. C.

Original · EN

We present measurements of the rates for an electron to tunnel on and off a quantum dot, obtained using a quantum point contact charge sensor. The tunnel rates show exponential dependence on drain-source bias and plunger gate voltages. The tunneling process is shown to be elastic, and a model describing tunneling in terms of the dot energy relative to the height of the tunnel barrier quantitatively describes the measurements.

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