Giant Vortices in Rotating Electron Droplets

E. Räsänen, H. Saarikoski, A. Harju, M.J. Puska, Y. Yu, S.M. Reimann

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)
105 Downloads (Pure)

Abstract

We predict the formation of giant vortices in quasi-two-dimensional quantum dots at high magnetic fields, i.e., in rapidly rotating electron droplets. Our numerical results for quantum dots confined by a flat, anharmonic potential show ground states where vortices are accumulated in the center of the dot, thereby leading to large cores in the electron and current densities. The phenomenon is analogous to what was recently found in rotating Bose-Einstein condensates. The giant-vortex states leave measurable signatures in the ground-state energetics. The conditions for the giant-vortex formation as well as the internal structure of the vortex cores are discussed.
Original languageEnglish
Article number235324
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B
Volume73
Issue number23
DOIs
Publication statusPublished - 14 Jun 2006
MoE publication typeA1 Journal article-refereed

Keywords

  • Density functional theory
  • Exact diagonalization
  • Fermion system
  • Vortex

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