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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Correlated counting of single electrons in a nanowire double quantum dot

Theodore Choi1, Ivan Shorubalko1, Simon Gustavsson1, Silke Schön2 and Klaus Ensslin1

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We report on correlated real-time detection of individual electrons in an InAs nanowire double quantum dot (DQD). Two self-aligned quantum point contacts (QPCs) in an underlying two-dimensional electron gas material serve as highly sensitive charge detectors for the DQD. Tunnel processes of individual electrons and all tunnel rates are determined by simultaneous measurements of the correlated signals of the QPCs.


PACS

73.63.Rt Nanoscale contacts

73.21.La Quantum dots

73.40.Gk Tunneling

73.22.-f Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals

73.63.Kv Quantum dots

Subjects

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 1 (January 2009)

Received 13 September 2008

Published 7 January 2009



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