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Observation of Quantum Asymmetry in an Aharonov-Bohm Ring

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

We have investigated the Aharonov-Bohm effect in a one-dimensional GaAs/GaAlAs ring at low magnetic fields. The oscillatory magnetoconductance of these systems are for the first time systematically studied as a function of 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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S. Pedersen, A. E. Hansen, A. Kristensen, C. B. Soerensen, P. E. Lindelof. 1999-05-10. Observation of Quantum Asymmetry in an Aharonov-Bohm Ring. https://doi.org/10.1103/physrevb.61.5457

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