Phase transitions in quantum dots

H. M. Müller, S. E. Koonin

Research output: Contribution to journalArticlepeer-review

Abstract

We perform Hartree-Fock calculations to show that quantum dots (i.e., two-dimensional systems of up to twenty interacting electrons in an external parabolic potential) undergo a gradual transition to a spin-polarized Wigner crystal with increasing magnetic-field strength. The phase diagram and ground-state energies have been determined. We tried to improve the ground state of the Wigner crystal by introducing a Jastrow ansatz for the wave function and performing a variational Monte Carlo calculation. The existence of so-called magic numbers was also investigated. Finally, we also calculated the heat capacity associated with the rotational degree of freedom of deformed many-body states.

Original languageEnglish (US)
Pages (from-to)14532-14539
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number20
DOIs
StatePublished - 1996

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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