We study ground states and excited states in semiconductor quantum dots containing 1 to 12 electrons. For the first time, it is possible to identify the quantum numbers of the states in the excitation spectra and make a direct comparison to exact calculations. A magnetic field induces transitions between excited states and ground state. These transitions are discussed in terms of crossings between single-particle states, singlet-triplet transitions, spin polarization, and Hund's rule. Our impurity-free quantum dots allow for atomic physics experiments in magnetic field regimes not accessible for atoms.
@article{arxiv.cond-mat/9708229,
title = {Excitation Spectra of Circular Few-Electron Quantum Dots},
author = {L. P. Kouwenhoven and T. H. Oosterkamp and M. W. S. Danoesastro and M. Eto and D. G. Austing and T. Honda and S. Tarucha},
journal= {arXiv preprint arXiv:cond-mat/9708229},
year = {2009}
}
Comments
21 pages, PDF. See also http://vortex.tn.tudelft.nl/mensen/leok/papers/