1997/08/29 by L. P. Kouwenhoven, T. H. Oosterkamp, M. W. S. Danoesastro +4
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1126/science.278.5344.1788
21 pages, PDF. See also http://vortex.tn.tudelft.nl/mensen/leok/papers/
arxiv created 1997/08/29 · arxiv updated 2009/11/30
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.