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

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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.
Original languageEnglish
JournalPhysical Review Letters
Volume91
Issue number24
Pages (from-to)246804
Number of pages4
ISSN0031-9007
DOIs
Publication statusPublished - 17 Apr 2003

    Research areas

  • cond-mat.mes-hall

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