Photocurrent, Rectification, and Magnetic Field Symmetry of Induced Current through Quantum Dots

L. DiCarlo, C. M. Marcus, and J. S. Harris, Jr.
Phys. Rev. Lett. 91, 246804 – Published 11 December 2003

Abstract

We report mesoscopic dc current generation in an open chaotic quantum dot with ac excitation applied to one of the shape-defining gates. For excitation frequencies large compared to the inverse dwell time of electrons in the dot (i.e., GHz), we find mesoscopic fluctuations of induced current that are fully asymmetric in the applied perpendicular magnetic field, as predicted by recent theory. Conductance, measured simultaneously, is found to be symmetric in field. In the adiabatic (i.e., MHz) regime, in contrast, the induced current is always symmetric in field, suggesting its origin is mesoscopic rectification.

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  • Received 16 April 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.246804

©2003 American Physical Society

Authors & Affiliations

L. DiCarlo and C. M. Marcus

  • Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA

J. S. Harris, Jr.

  • Department of Electrical Engineering, Stanford University, Stanford, California 94305, USA

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Vol. 91, Iss. 24 — 12 December 2003

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