Coulomb Blockade and Kondo Effect in a Quantum Hall Antidot
H. -S. Sim, M. Kataoka, Hangmo Yi, N. Y. Hwang, M. -S. Choi, S. -R. E. Yang
Abstract
We propose a general capacitive model for an antidot, which has two localized edge states with different spins in the quantum Hall regime. The capacitive coupling of localized excess charges, which are generated around the antidot due to magnetic flux quantization, and their effective spin fluctuation can result in Coulomb blockade, h/(2e) Aharonov-Bohm oscillations, and the Kondo effect. The resultant conductance is in qualitative agreement with recent experimental data.
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