Magnetic-field-induced spin and isospin blockade in two vertically coupled quantum dots
Universiteit Antwerpen (UIA), Departement Natuurkunde Universiteitsplein 1,
B-2610 Antwerpen, Belgium
Accepted: 6 July 2001
The magnetic-field dependence of the ground state of two vertically coupled quantum dots is studied within the current spin density functional theory. Increasing the magnetic field brings the system through different ground-state configurations, and it leads to a depopulation of the antibonding levels due to the strong electron-electron interactions. The system evolves through several spin and isospin blockade regions where tunneling peaks are suppressed.
PACS: 73.21.La – Quantum dots / 73.23.Hk – Coulomb blockade; single-electron tunneling
© EDP Sciences, 2001