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Single electron switching in a parallel quantum dot

F. Hofmann, T. Heinzel, D.A. Wharam, J.P. Kotthaus, G. Böhm, W. Klein, G. Tränkle, and G. Weimann
Phys. Rev. B 51, 13872(R) – Published 15 May 1995
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Abstract

Low-temperature conductance measurements have been performed upon a parallel quantum-dot configuration defined in the two-dimensional electron gas of a GaAs-AlxGa1xAs heterostructure. The observed Coulomb-blockade oscillations of the conducting dot exhibit pronounced periodic shifts as a consequence of the tunable coupling to the nonconducting dot. We show that the transport is essentially determined by the interdot capacitance and that the addition of a single electron to the nonconducting dot can switch the device conductance from a maximum to a Coulomb-blockade minimum.

  • Received 30 December 1994

DOI:https://doi.org/10.1103/PhysRevB.51.13872

©1995 American Physical Society

Authors & Affiliations

F. Hofmann, T. Heinzel, D.A. Wharam, and J.P. Kotthaus

  • Ludwig-Maximilians Universität, Geschwister-Scholl-Platz 1, D 80539, München, Germany

G. Böhm, W. Klein, G. Tränkle, and G. Weimann

  • Walter Schottky Institut, Technische Universität München, D 85748 Garching, Germany

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Vol. 51, Iss. 19 — 15 May 1995

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