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

The American Physical Society
Publication Date
  • Transformacions De Fase (Física Estadística)
  • Teoria Del Funcional De Densitat
  • Semiconductors
  • Phase Transformations (Statistical Physics)
  • Density Functional Theory
  • Physics


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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