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Deutsche Physikalische Gessellschaft IOP Institute of Physics

Non-equilibrium triplet blockade in parallel coupled quantum dots

J Fransson

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It is theoretically demonstrated that parallel weakly tunnel coupled quantum dots exhibit non-equilibrium blockade regimes caused by a full occupation in the spin triplet state, in analogy to the Pauli spin blockade in serially weakly coupled quantum dots. Charge tends to accumulate in the two-electron triplet for bias voltages that support transitions between the singlet and three-electron states.


PACS

73.23.Hk Coulomb blockade; single-electron tunneling

71.70.Gm Exchange interactions

73.63.Kv Quantum dots

75.30.Et Exchange and superexchange interactions

73.21.La Quantum dots

Subjects

Condensed matter: electrical, magnetic and optical

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 7 (July 2006)

Received 5 April 2006

Published 17 July 2006



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