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VOLUME 57 (1993) | ISSUE 9 | PAGE 596
Quasiballistic electronic interferometer
We have built and investigated an electronic interferometer based on a 2D electron gas in a AlGaAs/GaAs heterojunction. This is the smallest interferometer that has ever been built. We established that at Τ < 0.1 К the amplitude of the Aharonov-Bohm oscillations of the interferometer reaches 35% of the resistance of the interferometer in the absence of a magnetic field; this is almost twice the amplitude previously achieved.