Vortex Clusters in Quantum Dots

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2004
Major/Subject
Mcode
Degree programme
Language
en
Pages
116802/1-4
Series
Physical Review Letters, Volume 93, Issue 11
Abstract
We study electronic structures of two-dimensional quantum dots in strong magnetic fields using mean-field density-functional theory and exact diagonalization. Our numerically accurate mean-field solutions show a reconstruction of the uniform-density electron droplet when the magnetic field flux quanta enter one by one the dot in stronger fields. These quanta correspond to repelling vortices forming polygonal clusters inside the dot. We find similar structures in the exact treatment of the problem by constructing a conditional operator for the analysis. We discuss important differences and limitations of the methods used.
Description
Keywords
vortex, quantum dots, electronic structures, magnetic fields
Other note
Citation
Saarikoski, H. & Harju, A. & Puska, M. J. & Nieminen, Risto M. 2004. Vortex Clusters in Quantum Dots. Physical Review Letters. Volume 93, Issue 11. 116802/1-4. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.93.116802.