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Science 5 December 1997:
Vol. 278. no. 5344, pp. 1788 - 1792
DOI: 10.1126/science.278.5344.1788

Reports

Excitation Spectra of Circular, Few-Electron Quantum Dots

L. P. Kouwenhoven, T. H. Oosterkamp, M. W. S. Danoesastro, M. Eto, D. G. Austing, T. Honda, S. Tarucha

Studies of the ground and excited states in semiconductor quantum dots containing 1 to 12 electrons showed that the quantum numbers of the states in the excitation spectra can be identified and compared with exact calculations. A magnetic field induces transitions between the ground and excited states. These transitions were analyzed in terms of crossings between single-particle states, singlet-triplet transitions, spin polarization, and Hund's rule. These impurity-free quantum dots allow "atomic physics" experiments to be performed in magnetic field regimes not accessible for atoms.

L. P. Kouwenhoven, T. H. Oosterkamp, M. W. S. Danoesastro, Department of Applied Physics and Delft Institute of MicroElectronics and Submicrontechnology, Delft University of Technology, Post Office Box 5046, 2600 GA Delft, Netherlands.
M. Eto, Department of Physics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223, Japan.
D. G. Austing, T. Honda, S. Tarucha, NTT Basic Research Laboratories, 3-1, Morinosoto Wakamiya, Atsugi-shi, Kanagawa 243-01, Japan.


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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Current Rectification by Pauli Exclusion in a Weakly Coupled Double Quantum Dot System.
K. Ono, D. G. Austing, Y. Tokura, and S. Tarucha (2002)
Science 297, 1313-1317
   Abstract »    Full Text »    PDF »
Correlations Between Ground and Excited State Spectra of a Quantum Dot.
D. R. Stewart, D. Sprinzak, C. M. Marcus, C. I. Duruöz, and J. S. Harris Jr. (1997)
Science 278, 1784-1788
   Abstract »    Full Text »



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