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APS » Phys. Rev. Lett. » Volume 96 » Issue 7

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Phys. Rev. Lett. 96, 076605 (2006) [4 pages]

Counting Statistics of Single Electron Transport in a Quantum Dot

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S. Gustavsson, R. Leturcq, B. Simovi

, R. Schleser, T. Ihn, P. Studerus, and K. Ensslin
Solid State Physics Laboratory, ETH Zürich, CH-8093 Zürich, Switzerland

D. C. Driscoll and A. C. Gossard
Materials Department, University of California, Santa Barbara, California 93106, USA

Received 11 October 2005; published 24 February 2006

Wehave measured the full counting statistics of current fluctuations ina semiconductor quantum dot (QD) by real-time detection of singleelectron tunneling with a quantum point contact. This method givesdirect access to the distribution function of current fluctuations. Suppressionof the second moment (related to the shot noise) andthe third moment (related to the asymmetry of the distribution)in a tunable semiconductor QD is demonstrated experimentally. With thismethod we demonstrate the ability to measure very low currentand noise levels.

©2006 The American Physical Society

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.96.076605
DOI:	10.1103/PhysRevLett.96.076605
PACS:	72.70.+m; 73.23.Hk; 73.63.Kv 72.70.+m Noise processes and phenomena in electronic transport 73.23.Hk Coulomb blockade; single-electron tunneling 73.63.Kv Quantum dots (electronic transport) YEAR: 2006
KEYWORDS:	current fluctuations, Coulomb blockade, semiconductor quantum dots, gallium arsenide, aluminium compounds, III-V semiconductors

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