Quantum dots based on parabolic quantum wells: importance of electronic correlations
介观与纳米尺度物理
2009-11-11 v2 强关联电子
量子物理
摘要
We present measurements and theoretical interpretation of the magnetic field dependent excitation spectra of a two-electron quantum dot. The quantum dot is based on an AlGaAs parabolic quantum well with effective -factor close to zero. Results of tunneling spectroscopy of the four lowest states are compared to exact diagonalization calculations and a generalized Heitler--London approximation and good agreement is found. Electronic correlations, associated with the formation of an H-type Wigner molecule, turn out to be very important in this system.
引用
@article{arxiv.cond-mat/0610019,
title = {Quantum dots based on parabolic quantum wells: importance of electronic correlations},
author = {T. Ihn and C. Ellenberger and C. Yannouleas and U. Landman and K. Ensslin and D. Driscoll and A. C. Gossard},
journal= {arXiv preprint arXiv:cond-mat/0610019},
year = {2009}
}