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

Martí Pi, Agustí Emperador, Manuel Barranco, and Francesca Garcias
Phys. Rev. B 63, 115316 – Published 1 March 2001
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Abstract

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.

  • Received 27 April 2000

DOI:https://doi.org/10.1103/PhysRevB.63.115316

©2001 American Physical Society

Authors & Affiliations

Martí Pi, Agustí Emperador, and Manuel Barranco

  • Department d’Estructura i Constituents de la Matèria, Facultat de Física, Universitat de Barcelona, E-08028 Barcelona, Spain

Francesca Garcias

  • Department de Física, Facultat de Ciències, Universitat de les Illes Balears, E-07071 Palma de Mallorca, Spain

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Issue

Vol. 63, Iss. 11 — 15 March 2001

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