Vortex Clusters in Quantum Dots

H. Saarikoski, A. Harju, M.J. Puska, R.M. Nieminen

Research output: Contribution to journalArticleScientificpeer-review

59 Citations (Scopus)
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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.
Original languageEnglish
Article number116802
Pages (from-to)1-4
Number of pages4
JournalPhysical Review Letters
Volume93
Issue number11
DOIs
Publication statusPublished - 7 Sep 2004
MoE publication typeA1 Journal article-refereed

Keywords

  • density-functional
  • exact diagonalization
  • quantum dot
  • vortex

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