Laterally coupled few-electron quantum dots
凝聚态物理
2009-10-31 v1
摘要
We present ground-state calculations for laterally coupled quantum dots containing 2, 4, and 8 electrons. As our emphasis is on spin effects our results are obtained by applying spin-density functional theory (SDFT). By varying the distance between the centers of the coupled quantum dots, the transition from weak to strong coupling situation is realized. For the 2-electron system we also apply the Heitler-London approximation and analytical concepts to check the reliability of SDFT calculations in this case. In addition we discuss the features of the Coulomb staircase of laterally coupled quantum dots in the weak and strong coupling regimes in comparison to that of a circular parabolic quantum dot.
引用
@article{arxiv.cond-mat/0004209,
title = {Laterally coupled few-electron quantum dots},
author = {Andreas Wensauer and Oliver Steffens and Michael Suhrke and Ulrich Roessler},
journal= {arXiv preprint arXiv:cond-mat/0004209},
year = {2009}
}
备注
13 pages, 9 figures on 2 pages