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
TL;DR
This paper introduces a capacitive model for a quantum Hall antidot with two localized edge states, explaining Coulomb blockade, Aharonov-Bohm oscillations, and the Kondo effect, aligning well with experimental observations.
Contribution
It presents a novel capacitive model capturing spin-dependent charge interactions and quantum effects in quantum Hall antidots.
Findings
Qualitative agreement with experimental conductance data
Explanation of Coulomb blockade and Kondo phenomena in antidots
Prediction of h/(2e) Aharonov-Bohm oscillations
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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