Vertically coupled quantum dots in the local spin-density functional theory

Details Vertically coupled quantum dots in the local spin-density functional theory Vertically coupled quantum dots in the local spin-density functional theory

2001-01-08

arxiv.org/abs/cond-mat/0101089v1

Phys. Rev. B 63, (2001) 115316

Physics

Condensed Matter

Typeset using Revtex, 14 pages and 12 Postscript figures, to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.63.115316

We have investigated the structure of double quantum dots vertically coupled at zero magnetic field within local spin-density functional theory. The dots are identical and have a finite width, and the whole system is axially symmetric. We first discuss the effect of thickness on the addition spectrum of one single dot. Next, we describe the structure of coupled dots as a function of the interdot distance for different electron numbers. Addition spectra, Hund's rule and molecular-type configurations are discussed. It is shown that self-interaction corrections to the density functional results do not play a very important role in the calculated addition spectra.

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