Molecular phases in coupled quantum dots
介观与纳米尺度物理
2009-11-10 v1 强关联电子
量子物理
摘要
We present excitation energy spectra of few-electron vertically coupled quantum dots for strong and intermediate inter-dot coupling. By applying a magnetic field, we induce ground state transitions and identify the corresponding quantum numbers by comparison with few-body calculations. In addition to atomic-like states, we find novel "molecular-like" phases. The isospin index characterizes the nature of the bond of the artificial molecule and this we control. Like spin in a single quantum dot, transitions in isospin leading to full polarization are observed with increasing magnetic field.
引用
@article{arxiv.cond-mat/0401145,
title = {Molecular phases in coupled quantum dots},
author = {M. Rontani and S. Amaha and K. Muraki and F. Manghi and E. Molinari and S. Tarucha and D. G. Austing},
journal= {arXiv preprint arXiv:cond-mat/0401145},
year = {2009}
}
备注
PDF file only, 28 pages, 3 tables, 4 color figures, 2 appendices. To appear in Physical Review B, Scheduled 15 Feb 2004, Vol. 69, Issue 8