Europhys. Lett.
Volume 66, Number 3, May 2004
Page(s) 405 - 411
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 01 April 2004
Europhys. Lett., 66 (3) , pp. 405-411 (2004)
DOI: 10.1209/epl/i2004-10009-9

Dynamical spin-blockade in a quantum dot with paramagnetic leads

A. Cottet and W. Belzig

Departement Physik und Astronomie, Universität Basel Klingelbergstrasse 82, CH-4056 Basel, Switzerland

(Received 26 January 2004; accepted 20 February 2004)

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.

73.23.-b - Electronic transport in mesoscopic systems.
72.70.+m - Noise processes and phenomena.
72.25.Rb - Spin relaxation and scattering.

© EDP Sciences 2004