The interplay between shell effects and electron correlations in quantum dots

Authors:
Jens Harting   Phone: +49-(0)441-798-3467   Fax: +49-(0)441-798-3201
Oliver Muelken   Phone: +49-(0)441-798-3467   Fax: +49-(0)441-798-3201
Peter Borrmann   Phone: +49-(0)441-798-3362   Fax: +49-(0)441-798-3201

Affiliation:
Small systems group   University of Oldenburg, Germany

Files:
http://xxx.lanl.gov/abs/cond-mat/0002269

Date: 20000217

Article: published in Phys. Rev. B 62, 10207 (2000)

Keywords:
quantum dots, wigner crystallisation, path integral, electron correlation, addition energies, pimc

Abstract:
We use the Path Integral Monte Carlo method to investigate the
interplay between shell effects and electron correlations in single quantum
dots with up to 12 electrons. By use of an energy estimator based on the
hypervirial theorem of Hirschfelder we study the energy contributions of
different interaction terms in detail. We discuss under which conditions the
total spin of the electrons is given by Hund's rule, and the temperature
dependence of the crystallization effects.  

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Upload by Oliver Muelken on February 17th 2000