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RESEARCH PRODUCT
Aharonov-Bohm effect in many-electron quantum rings
Ville KotimäkiEsa Räsänensubject
PhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsStrongly Correlated Electrons (cond-mat.str-el)Condensed matter physicsbusiness.industryOscillationFOS: Physical sciencesQuantum PhysicsTime-dependent density functional theoryElectronCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsMagnetic fieldCondensed Matter - Strongly Correlated Electronssymbols.namesakeSemiconductorQuantum dotQuantum mechanicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)symbolsbusinessAharonov–Bohm effectQuantumdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-03-05 | Physical Review B |