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

TY - JOUR

T1 - Photocurrent, Rectification, and Magnetic Field Symmetry of Induced Current Through Quantum Dots

AU - DiCarlo, L.

AU - M. Marcus, C.

AU - Harris jr, J.

PY - 2003/4/17

Y1 - 2003/4/17

N2 - 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.

AB - 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.

KW - cond-mat.mes-hall

U2 - 10.1103/PhysRevLett.91.246804

DO - 10.1103/PhysRevLett.91.246804

M3 - Journal article

C2 - 14683146

SN - 0031-9007

VL - 91

SP - 246804

JO - Physical Review Letters

JF - Physical Review Letters

IS - 24

ER -