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Phys. Rev. B 63, 205308 (2001) [15 pages]

Stochastic variational approach to few-electron artificial atoms

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K. Varga1,*, P. Navratil2,†, J. Usukura3, and Y. Suzuki4
1Solid State Division, Oak Ridge National Laboratory, Oak Ridge, 37831 TennesseeInstitute for Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), P. O. Box 51, 4000 Debrecen, Hungary
2Lawrence Livermore National Laboratory, P. O. Box 808, Livermore, California 94551
3Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
4Department of Physics, Niigata University, Niigata 950-2181, Japan

Received 17 October 2000; revised 3 January 2001; published 23 April 2001

The spectra of quantum dots of different geometries (quantum ring, quantum cylinder, spherical square well, and parabolic) are studied. The stochastic variational method on correlated Gaussian basis functions and a large scale shell-model approach have been used to investigate these “artificial” atoms and their properties in magnetic fields. Accurate numerical results are presented for N=2–8 electron systems.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.63.205308
DOI:
10.1103/PhysRevB.63.205308
PACS:
73.61.-r, 85.35.Be

*Corresponding author. Email address: vargak@ornl.gov

†On leave from Nuclear Physics Institute, Academy of Sciences of the Czech Republic, 250 68 Rez near Prague, Czech Republic.

 
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