Theory of electronic Mach-Zehnder interferometers in the Integer Quantum Hall effect regime

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• Dr D Kovrizhin, U of Oxford
• Thursday 08 October 2009, 14:00-15:00
• Theory Library.

If you have a question about this talk, please contact Dr Dimitri M Gangardt.

Recent experiments with electronic Mach-Zehnder interferometers constructed from Integer quantum Hall edge states showed unexpected and remarkable effects of long range electron interactions [1,2]. The most striking observation was appearance of the lobes in the visibility of Aharonov-Bohm fringes as a function of applied source-drain bias voltage. In my talk I will give an overview of the experimental and theoretical results, concentrating on the exact solution which we obtained recently with J. T. Chalker [3] for the interferometer with long-range interactions at finite bias voltage. Our results match experimental findings of [1,2].

References: [1] I. Neder, M. Heiblum, Y. Levinson, D. Mahalu, and V. Umansky, Phys. Rev. Lett. 96, 016804, (2006). [2] P. Roulleau, F. Portier, D. C. Glattli, P. Roche, A. Cavanna, G. Faini, U. Gennser, and D. Mailly, Phys. Rev. B 76 , 161309® (2007). [3] D. L. Kovrizhin and J. T. Chalker, arXiv:0903.3387.

This talk is part of the Theoretical Physics Seminars series.

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