Vortex formation in quantum dots in high magnetic fields

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dc.creatorSaarikoski, H.
dc.creatorHarju, A.
dc.creatorPuska, M. J.
dc.creatorNieminen, R. M.
dc.date2004-04-29
dc.date.accessioned2026-07-07T02:57:53Z
dc.date.available2026-07-07T02:57:53Z
dc.descriptionWe study electronic structures of two-dimensional quantum dots in high magnetic fields using the density-functional theory (DFT) and the exact diagonalization (ED). With increasing magnetic field, beyond the formation of the totally spin-polarized maximum density droplet (MDD) state, the DFT gives the ground-state total angular momentum as a continuous function with well-defined plateaus. The plateaus agree well with the magic angular momenta of the ED calculation. By constructing a conditional wave function from the Kohn-Sham states we show that vortices enter the quantum dot one-by-one at the transition to the state with the adjacent magic angular momentum. Vortices are also observed outside the high-density region of the quantum dot. These findings are compared to the ED results and we report a significant agreement. We study also interpretations and limitations of the density functional approach in these calculations.
dc.description4 pages, 5 figures, QD2004 conference paper
dc.identifierhttps://arxiv.org/abs/cond-mat/0404704
dc.identifierhttp://arxiv.org/abs/cond-mat/0404704
dc.identifierPhysica E 26, 317 (2005)
dc.identifierdoi:10.1016/j.physe.2004.08.070
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23853
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titleVortex formation in quantum dots in high magnetic fields
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