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Aharonov-Bohm effect in many-electron quantum rings

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Details

Original languageEnglish
Article number245316
Number of pages6
JournalPhysical Review B
Volume81
Issue number24
DOIs
Publication statusPublished - 17 Jun 2010
Externally publishedYes
Publication typeA1 Journal article-refereed

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.

Keywords

  • DENSITY-FUNCTIONAL THEORY, NORMAL-METAL RINGS, ELECTROMAGNETIC POTENTIALS, OSCILLATIONS, CONDUCTANCE, OCTOPUS, TOOL