Formation of pure two-electron triplet states in weakly coupled quantum dots attached to ferromagnetic leads
arXiv:cond-mat/0608565 · doi:10.1088/0957-4484/17/21/010
Abstract
Weakly coupled quantum dots in the Pauli spin blockade regime are considered with respect to spin-dependent transport. By attaching one half-metallic and one non-magnetic lead, the Pauli spin blockade if formed by a pure triplet state with spin moment $S_z=1$ or -1. Furthermore, additional spin blockade regimes emerge because of full occupation in states with opposite spin to that of the half-metallic lead.
6 pages, 2 figures, 1 table, minor changes to appear as published