Spin oscillation and its reduction in a quantum dot

Jia Lin Zhu, Ziqiang Zhu, Yoshiyuki Kawazoe, Takafumi Yao

研究成果: Article査読

13 被引用数 (Scopus)


Exact spectra of two electrons in quantum dots (QD’s) with parabolic potentials in a magnetic field are obtained. The spectra are dramatically changed with the variation of the field and that the spin of the ground state oscillates with magnetic field. The reason is found by studying confinement dependence of the interaction energies in detail. The lowest singlet and triplet states of two electrons in disklike QD’s with fixed thickness and a positively charged ion in magnetic field are calculated by a variational method. It is found that the broken symmetry of a QD with an ion has an important effect on the spin oscillation. The ion reduces the oscillation, and the oscillation reduction and the binding energies are strongly dependent on the broken symmetry related to the dot-reflection symmetry and the ion position. The results predict a possibility to observe phenomena related to ion-electron and electron-electron interactions in broken symmetry QD’s.

ジャーナルPhysical Review B - Condensed Matter and Materials Physics
出版ステータスPublished - 1998

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学


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