Positive cross correlations in a three-terminal quantum dot with ferromagnetic contacts

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2004
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Cottet, Audrey
Bruder, Christoph
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Physical Review Letters. 2004, 92, 206801. Available under: doi: 10.1103/PhysRevLett.92.206801
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We study current fluctuations in an interacting three-terminal quantum dot with ferromagnetic leads. For appropriately polarized contacts, the transport through the dot is governed by dynamical spin blockade, i.e., a spin-dependent bunching of tunneling events not present in the paramagnetic case. This leads, for instance, to positive zero-frequency cross correlations of the currents in the output leads even in the absence of spin accumulation on the dot. We include the influence of spin-flip scattering and identify favorable conditions for the experimental observation of this effect with respect to polarization of the contacts and tunneling rates.

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ISO 690COTTET, Audrey, Wolfgang BELZIG, Christoph BRUDER, 2004. Positive cross correlations in a three-terminal quantum dot with ferromagnetic contacts. In: Physical Review Letters. 2004, 92, 206801. Available under: doi: 10.1103/PhysRevLett.92.206801
BibTex
@article{Cottet2004Posit-9324,
  year={2004},
  doi={10.1103/PhysRevLett.92.206801},
  title={Positive cross correlations in a three-terminal quantum dot with ferromagnetic contacts},
  volume={92},
  journal={Physical Review Letters},
  author={Cottet, Audrey and Belzig, Wolfgang and Bruder, Christoph},
  note={Article Number: 206801}
}
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