Spin-resolved noise in transport through T-shaped double quantum dots

Details Spin-resolved noise in transport through T-shaped double quantum dots Spin-resolved noise in transport through T-shaped double quantum dots

2011-09-02

arxiv.org/abs/1109.0481v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 6 figures; Submitted to J. Phys.: Conden. Matt

Scientific paper

We investigate fluctuations of spin-dependent current through T-shaped double quantum dots connected with ferromagnetic electrodes. Based on the spin-resolved master equation approach, we are able to analyze individual self or mutual spin correlation shot noises for different electrode magnetization configurations (parallel and antiparallel alignments). Owing to the modulation of the interdot coupling, as well as the interplay between the Coulomb interaction and spin polarization in the electrodes, a number of remarkable noise behaviors, such as super-Poissonian self spin correlation, positive or negative mutual spin correlation noises, are revealed. The associated underlying mechanisms responsible for these results are discussed.

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