Kondo Effect in a Quantum Antidot
摘要
We report Kondo-like behaviour in a quantum antidot (a submicron depleted region in a two-dimensional electron gas) in the quantum-Hall regime. When both spin branches of the lowest Landau level encircle the antidot in a magnetic field ( T), extra resonances occur between extended edge states via antidot bound states when tunnelling is Coulomb blockaded. These resonances appear only in alternating Coulomb-blockaded regions, and become suppressed when the temperature or source-drain bias is raised. Although the exact mechanism is unknown, we believe that Kondo-like correlated tunnelling arises from skyrmion-type edge reconstruction. This observation demonstrates the generality of the Kondo phenomenon.
引用
@article{arxiv.cond-mat/0210084,
title = {Kondo Effect in a Quantum Antidot},
author = {M. Kataoka and C. J. B. Ford and M. Y. Simmons and D. A. Ritchie},
journal= {arXiv preprint arXiv:cond-mat/0210084},
year = {2009}
}
备注
9 pages, 3 figures (Fig.3 in colour), to appear in Phys. Rev. Lett