Aharonov-Bohm effect in many-electron quantum rings

V. Kotimäki and E. Räsänen
Phys. Rev. B 81, 245316 – Published 17 June 2010

Abstract

The Aharonov-Bohm effect is investigated in two-dimensional, single-terminal quantum rings in magnetic fields by using time-dependent density-functional theory. We find multiple transport loops leading to the oscillation periods of h/(en), where n is the number of loops. We show that the Aharonov-Bohm oscillations are relatively weakly affected by the electron-electron interactions, whereas the ring width has a strong effect on the characteristics of the oscillations. Our results propose that in those experimental semiconductor quantum-ring devices that show clear Aharonov-Bohm oscillations the electron current is dominated by a few states along narrow conduction channels.

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  • Received 5 March 2010

DOI:https://doi.org/10.1103/PhysRevB.81.245316

©2010 American Physical Society

Authors & Affiliations

V. Kotimäki and E. Räsänen*

  • Nanoscience Center, Department of Physics, University of Jyväskylä, FI-40014 Jyväskylä, Finland

  • *erasanen@jyu.fi

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Issue

Vol. 81, Iss. 24 — 15 June 2010

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