Spin correlations in spin blockade

Details Spin correlations in spin blockade Spin correlations in spin blockade

2008-09-08

arxiv.org/abs/0809.1368v2

New J. Phys. 10 (2008) 115013

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 9 figures

Scientific paper

10.1088/1367-2630/10/11/115013

We investigate spin currents and spin-current correlations for double quantum dots in the spin blockade regime. By analysing the time evolution of the density matrix, we obtain the spin resolved currents and derive from a generating function an expression for the fluctuations and correlations. Both the charge current and the spin current turn out to be generally super-Poissonian. Moreover, we study the influence of ac fields acting upon the transported electrons. In particular, we focus on fields that cause spin rotation or photon-assisted tunnelling.

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