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. Les-anneaux-interffrommtriques, phase macroscopique des oscillations AB une diiirence ggommtrique, prrsence d'une impurett artiicielle ou non.... entre les deux bras de l'anneau, sont un outil puissant d''tude du transport lectronique et en font un dispositif mmsoscopique inttressant pour l'avenir. Le domaine de fonctionnement est certes encore limitt aux basses tempratures

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G. M. Gusev, J. R. Leite, E. B. Olshanetskii, N. T. Moshegov, A. I. Toropov et al., Portal Quantum Hall eeect in a wide parabolic well, Proceedings of the 14th International Conference on High Magnetic Fields in Semiconductors Physics, 2000.