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https://repositorio.ufba.br/handle/ri/14654
metadata.dc.type: | Artigo de Periódico |
Title: | The violation of the Hund rule in semiconductor artificial atoms |
Other Titles: | Semiconductor Science and Technology |
Authors: | Vianna, J. D. M. Destefani, C. F. Marques, G. E. |
metadata.dc.creator: | Vianna, J. D. M. Destefani, C. F. Marques, G. E. |
Abstract: | 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 1p-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. |
metadata.dc.rights: | Acesso Aberto |
URI: | http://repositorio.ufba.br/ri/handle/ri/14654 |
Issue Date: | 2004 |
Appears in Collections: | Artigo Publicado em Periódico (FIS) |
Files in This Item:
File | Description | Size | Format | |
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J D M Vianna.pdf | 289,52 kB | Adobe PDF | View/Open |
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