Excitation Spectra of Circular Few-Electron Quantum Dots

Details Excitation Spectra of Circular Few-Electron Quantum Dots Excitation Spectra of Circular Few-Electron Quantum Dots

1997-08-29

arxiv.org/abs/cond-mat/9708229v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

21 pages, PDF. See also http://vortex.tn.tudelft.nl/mensen/leok/papers/

Scientific paper

10.1126/science.278.5344.1788

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.

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