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Integer filling facfor phases and isospin in vertical diatomic artificial molecules
Austing, D. G.; Tarucha, S.; Tamura, H.; Muraki, K.; Ancilotto, Francesco; Barranco Gómez, Manuel; Emperador, Agustí; Mayol Sánchez, Ricardo; Pi Pericay, Martí
Universitat de Barcelona
Integer filling factor phases of many-electron vertically coupled diatomic artificial quantum dot molecules are investigated for different values of the interdot coupling. The experimental results are analyzed within local-spin density functional theory for which we have determined a simple lateral confining potential law that can be scaled for the different coupling regimes, and Hartree-Fock theory. Maximum density droplets composed of electrons in both bonding and antibonding or just bonding states are revealed, and interesting isospin-flip physics appears for weak interdot coupling when the systematic depopulation of antibonding states leads to changes in isospin.
2010-05-04
Spin (Física nuclear)
Diagrames de fase
Teoria del funcional de densitat
Estructura electrònica
Semiconductors
Nuclear spin
Phase diagrams
Density functional theory
Electronic structure
Semiconductors
(c) The American Physical Society, 2004
Article
The American Physical Society
         

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