Aharonov-Bohm oscillation amplitude in small ballistic interferometers |
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| Authors: | V. A. Tkachenko Z. D. Kvon D. V. Sheglov A. V. Latyshev A. I. Toropov O. A. Tkachenko D. G. Baksheyev A. L. Aseev |
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| Affiliation: | (1) Institute of Semiconductor Physics, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090, Russia;(2) Novosibirsk State University, Novosibirsk, 630090, Russia |
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| Abstract: | Small-radius (110 nm) ring interferometers were fabricated by the local anodic oxidation of AlGaAs/GaAs heterostructures containing 2D electron gas. Measurements and modeling show that a small ring asymmetry, which is detected by an atomic force microscope, leads to a small amplitude of Aharonov-Bohm oscillations, while a stronger asymmetry completely suppresses these oscillations. |
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