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

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

1999-09-16

arxiv.org/abs/cond-mat/9909246v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures; to appear in Physica E (proceedings of MSS9)

Scientific paper

10.1016/S1386-9477(00)00056-4

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 $\pi$ 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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