Magnetic-Field-Induced Transitions of Many-Electron States in Quantum Dots

Akiko Natori, Daisuke Nakamura

Research output: Contribution to journalConference article

7 Citations (Scopus)

Abstract

The many-electron eigenstates of anisotropic parabolic quantum dots with cylindrical symmetry are investigated using an unrestricted Hartree-Fock method, in a magnetic field parallel to the cylindrical z-axis. The many-electron eigenstates are assigned by two quantum numbers, Lz and Sz, the z-components of the total orbital angular momentum and the total spin, respectively. The many-electron ground states exhibit sequential transitions via three stages with increasing magnetic field, At the transition magnetic fields, the ground state energy crosses that of the first-excited state with different values of (Lz, Sz) and they replace each other. The phase diagram of the ground state is obtained in a space of the magnetic field and the electron number. The phase diagram is greatly affected by the lateral extent of quantum dots, but the effect of the vertical extent is small for quasi-two-dimensional quantum dots. In these magnetic field induced transitions, the Hartree interaction plays a dominant role.

Original languageEnglish
Pages (from-to)380-383
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume38
Issue number1 B
DOIs
Publication statusPublished - Jan 1 1999
Externally publishedYes
EventProceedings of the 1998 International Symposium on Formation, Physics and Device Application of Quantum Dot Structures, QDS-98 - Sapporo, Japan
Duration: May 31 1998Jun 4 1998

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All Science Journal Classification (ASJC) codes

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

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