Distribution of peak spacings of the Coulomb oscillation is theoretically investigated in disordered quantum dots. Taking account of the electron-electron interaction by the perturbation, we show that a pair-type (BCS-type) correlation plays an important role in determining the distribution in the diffusive region. The correlation effect can result in a sharp peak structure of the distribution, deviating drastically from the prediction of the random matrix theory, in the absence of a magnetic field. Numerical results support the proposed mechanisms. The pair-type correlation does not work in the presence of a magnetic field.
|ジャーナル||Physica Status Solidi (B) Basic Research|
|出版ステータス||Published - 2000 3|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics