Formation of pure two-electron triplet states in weakly coupled quantum dots attached to ferromagnetic leads

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.

arXiv comment6 pages, 2 figures, 1 table, minor changes to appear as published

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• Effects of different geometries on the conductance, shot noise and tunnel magnetoresistance of double quantum dots
• Tunable Kondo effect in double quantum dots coupled to ferromagnetic contacts
• Transport through a double quantum dot system with non-collinearly polarized leads
• Waiting time distribution revealing the internal spin dynamics in a double quantum dot
• Tunneling transport through multi-electrons states in coupled quantum dots with Coulomb correlations
• Charge and spin configurations in the coupled quantum dots with Coulomb correlations induced by tunneling current
• Spin-polarized transport through weakly coupled double quantum dots in the Coulomb-blockade regime
• Pauli spin blockade with site-dependent g-tensors and spin-polarized leads
• Revealing the internal spin dynamics in a double quantum dot by periodic voltage modulation