Electronic structures of few electrons in a quantum dot under magnetic fields

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Abstract

The many-body effect on the electronic structures of a few electrons confined in a quantum dot is calculated, under magnetic fields, by the exact diagonalization method. When the Coulomb interaction is comparable to the one-electron level spacings and the magnetic field is not too large, the peak positions of the Coulomb oscillation reflect a shell structure of the one-electron levels, which is in semi-quantitative agreement with experimental results [Tarucha et al.: Phys. Rev. Lett. 77 (1996) 3613]. Under strong magnetic fields, the correlation effect results in transitions of the ground state. These transitions can be observed as cusps of the magnetic-field dependence of the peak positions, in the presence of the Zeeman effect.

Original languageEnglish
Pages (from-to)3924-3927
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume36
Issue number6 SUPPL. B
Publication statusPublished - 1997 Jun 1

Keywords

  • Correlation effect
  • Coulomb blockade
  • Coulomb oscillation
  • Exact diagonalization
  • Quantum dot

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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