Origin of Magic Angular Momentum in a Quantum Dot under Strong Magnetic Field

Taku Seki, Yoshio Kuramoto, Tomotoshi Nishino

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

This paper investigates origin of the extra stability associated with particular values (magic numbers) of the total angular momentum of electrons in a quantum dot under strong magnetic field. The ground-state energy, distribution functions of density and angular momentum, and pair correlation function are calculated in the strong field limit by numerical diagonalization of the system containing up to seven electrons. It is shown that the composite fermion picture explains the small magic numbers well, while a simple geometrical picture does better as the magic number increases. Combination of these two pictures leads to identification of all the magic numbers. Relation of the magic-number states to the Wigner crystal and the fractional quantum Hall state is discussed.

Original languageEnglish
Pages (from-to)3945-3951
Number of pages7
Journaljournal of the physical society of japan
Volume65
Issue number12
DOIs
Publication statusPublished - 1996 Jan 1

Keywords

  • Composite fermion
  • Exact diagonalization
  • Fractional quantum hall state
  • Magic number
  • Quantum dot
  • Wigner crystal

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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