Magnetic-field-induced spin and isospin blockade in two vertically coupled quantum dots

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