Electrostatic potential, energy spectrum, and Fano resonances in a ballistic ring interferometer based on an AlGaAs/GaAs heterojunction |
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| Authors: | O A Tkachenko V A Tkachenko D G Baksheev Z D Kvon J C Portal |
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| Institution: | (1) Institute of Semiconductor Physics, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 13, Novosibirsk, 630090, Russia;(2) Grenoble High Magnetic Fields Laboratory, MPI-FKF and CNRS, B.P.166, F-38042 Grenoble, France;(3) Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia |
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| Abstract: | For a ballistic ring interferometer based on high-mobility two-dimensional electron gas in an AlGaAs/GaAs heterojunction, the electrostatic potential and the energy spectrum are determined. It is shown that the splitting points in such an interferometer have the form of triangular potential wells. Calculation is performed for the two-dimensional electron transmission through the ring, and the Fano resonances caused by the coupling of the transmitted waves with the levels of higher transverse modes in triangular wells are predicted. These resonances are observed in the experiment. |
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