C. I. Duruöz

Scanned potential microscopy of edge and bulk currents in the quantum Hall regime

Using an atomic force microscope as a local voltmeter, we measure the Hall voltage profile in a two-dimensional electron gas in the quantum Hall (QH) regime. We observe a linear profile in the bulk of the sample in the transition regions between QH plateaus and a distinctly nonlinear profile on the plateaus. In addition, localized voltage drops are observed at the sample edges in the transition regions. We interpret these results in terms of theories of edge and bulk current in the QH regime. {copyright} {ital 1999} {ital The American Physical Society}

STATISTICS OF COULOMB BLOCKADE PEAK SPACINGS

Distributions of Coulomb blockade peak spacings are reported for large ensembles of both unbroken (magnetic field

Low-Temperature Saturation of the Dephasing Time and Effects of Microwave Radiation on Open Quantum Dots

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Distributions of the Conductance and its Parametric Derivatives in Quantum Dots

) and broken (

Spin Degeneracy and Conductance Fluctuations in Open Quantum Dots

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Coulomb Blockade Fluctuations in Strongly Coupled Quantum Dots

) time-reversal symmetry in GaAs quantum dots. Both distributions are symmetric and roughly Gaussian with a width of

CHANGING THE ELECTRONIC SPECTRUM OF A QUANTUM DOT BY ADDING ELECTRONS

\ensuremath{\sim}2%\char21{}6%

Scanned potential microscopy of a two-dimensional electron gas

of the average spacing, with broad, non-Gaussian tails. The distribution is systematically wider at

Phase-breaking rates from conductance fluctuations in a quantum dot

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Statistics of Peak Spacings and Widths in the Quantum Coulomb Blockade Regime

by a factor of