Various spin-polarization states beyond the maximum-density droplet: a quantum Monte Carlo study

S. Siljamäki, A. Harju, R.M. Nieminen, V.A. Sverdlov, P. Hyvönen

Research output: Contribution to journalArticleScientificpeer-review

23 Citations (Scopus)
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Abstract

Using a variational quantum Monte Carlo method, the effect of Landau-level mixing on the lowest-energy–state diagram of small quantum dots is studied in the magnetic-field range where the density of magnetic flux quanta just exceeds the density of electrons. An accurate analytical many-body wave function is constructed for various angular momentum and spin states in the lowest Landau level, and Landau-level mixing is then introduced using a Jastrow factor. The effect of higher Landau levels is shown to be significant; the transition lines are shifted considerably towards higher values of magnetic field and certain lowest-energy states vanish altogether.
Original languageEnglish
Article number121306
Pages (from-to)1-4
JournalPhysical Review B
Volume65
Issue number12
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

Keywords

  • Landau-level mixing
  • maximum-density droplet
  • quantum dot
  • quantum Monte Carlo

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