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

2001/01/08 by M. Pí, Marti Pi, Agustí Emperador +5
Engineering · Physics and Astronomy · #Advanced Chemical Physics Studies #Molecular Junctions and Nanostructures #Quantum and electron transport phenomena #cond-mat

paper · pdf · doi:10.1103/physrevb.63.115316

published as Phys. Rev. B 63, (2001) 115316 · Typeset using Revtex, 14 pages and 12 Postscript figures, to be published in Phys. Rev. B

arxiv created 2001/01/08 · openalex publication_date 2001/03/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

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.

Citations

• Accurate spin-dependent electron liquid correlation energies for local spin density calculations: a critical analysis
• Spin-density-functional theory of circular and elliptical quantum dots
• Self-interaction correction to density-functional approximations for many-electron systems