2004/04/01 by C. F. Destefani, Carlos F. Destefani, J. D. M. Vianna +1
Physics and Astronomy · #Advanced Chemical Physics Studies #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall
paper · pdf · doi:10.1088/0268-1242/19/8/l03
published as Semicond. Sci. Technol. 19 (2004), L90-L94 · 5 pages, 2 figures, submitted to Semic. Sci. Technol
arxiv created 2004/04/01 · openalex publication_date 2004/07/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
The unrestricted Pople–Nesbet approach for real atoms is adapted to quantum dots under applied magnetic field. Gaussian basis sets are used instead of the exact single-particle orbitals in the construction of the appropriated Slater determinants. Both system chemical potential and charging energy are calculated, as well as the expected values for total spin and its z -component. We have verified the validity of the energy shell structure as well as the Hund rule for state population at zero magnetic field. Above given fields, we have observed a violation of the Hund rule by the suppression of triplet and quartet states at the 1 p -energy shell, taken as an example. We have also compared our present results with those obtained by using the LS -coupling scheme for low electronic occupations. We have focused our attention on ground-state properties of GaAs quantum dots populated up to 40 electrons.