Multiple quantum phases in artificial double-dot molecules
介观与纳米尺度物理
2009-10-31 v1 强关联电子
摘要
We study coupled semiconductor quantum dots theoretically through a generalized Hubbard approach, where intra- and inter-dot Coulomb Correlation, as well as tunneling effects are described on the basis of realistic electron wavefunctions. We find that the ground-state configuration of vertically-coupled double dots undergoes non-trivial quantum transitions as a function of the inter-dot distance d; at intermediate values of d we predict a new phase that should be observable in the addition spectra and in the magnetization changes.
引用
@article{arxiv.cond-mat/9906341,
title = {Multiple quantum phases in artificial double-dot molecules},
author = {Massimo Rontani and F. Rossi and F. Manghi and E. Molinari},
journal= {arXiv preprint arXiv:cond-mat/9906341},
year = {2009}
}
备注
RevTeX, 4 pages, 4 ps figures, to appear in Solid State Communications