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Dynamical spin-blockade in a quantum dot with paramagnetic leads

A. Cottet and W. Belzig

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We investigate current fluctuations in a three-terminal quantum dot in the sequential tunneling regime. Dynamical spin-blockade can be induced when the spin-degeneracy of the dot states is lifted by a magnetic field. This results in super-Poissonian shot noise and positive zero-frequency cross-correlations. Our proposed setup can be realized with semiconductor quantum dots.


PACS

73.23.-b Electronic transport in mesoscopic systems

72.25.Rb Spin relaxation and scattering

72.70.+m Noise processes and phenomena

Subjects

Condensed matter: electrical, magnetic and optical

Surfaces, interfaces and thin films

Dates

Issue 3 (May 2004)

Received 26 January 2004, accepted for publication 20 February 2004



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