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Investigation of the Mesoscopic Aharonov-Bohm effect in Low Magnetic Fields

A. E. Hansen·S. Pedersen·A. Kristensen·C. B. Sorensen·P. E. Lindelof
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Abstract

We have investigated the Aharonov-Bohm effect in mesoscopic semiconductor GaAs/GaAlAs rings in low magnetic fields. The oscillatory magnetoconductance of these systems is systematically studied as a function of electron density. We observe phase-shifts of $π$ in the magnetoconductance oscillations, and halving of the fundamental $h/e$ period, as the density is varied. Theoretically we find agreement with the experiment, by introducing an asymmetry between the two arms of the ring.

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A. E. Hansen, S. Pedersen, A. Kristensen, C. B. Sorensen, P. E. Lindelof. 1999-09-16. Investigation of the Mesoscopic Aharonov-Bohm effect in Low Magnetic Fields. https://doi.org/10.1016/s1386-9477(00)00056-4

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