Publikation:

Semiclassical theory of spin-polarized shot noise in mesoscopic diffusive conductors

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2005

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Zareyan, Malek

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-33173
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https://doi.org/10.1103/PhysRevB.71.184403
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Physical Review B. 2005, 71, 184403. Available under: doi: 10.1103/PhysRevB.71.184403

Zusammenfassung

We study fluctuations of spin-polarized currents in a three-terminal spin-valve system consisting of a diffusive normal metal wire connected by tunnel junctions to three ferromagnetic terminals. Based on a spin-dependent Boltzmann-Langevin equation, we develop a semiclassical theory of charge and spin currents and the correlations of the currents fluctuations. In the three terminal system, we show that current fluctuations are strongly affected by the spin-flip scattering in the normal metal and the spin polarizations of the terminals, which may point in different directions. We analyze the dependence of the shot noise and the cross-correlations on the spin-flip scattering rate in the full range of the spin polarizations and for different magnetic configurations. Our result demonstrate that noise measurements in multi-terminal devices allow to determine the spin-flip scattering rate by changing the polarizations of ferromagnetic terminals.

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530 Physik

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ISO 690ZAREYAN, Malek, Wolfgang BELZIG, 2005. Semiclassical theory of spin-polarized shot noise in mesoscopic diffusive conductors. In: Physical Review B. 2005, 71, 184403. Available under: doi: 10.1103/PhysRevB.71.184403
BibTex
@article{Zareyan2005Semic-9247,
  year={2005},
  doi={10.1103/PhysRevB.71.184403},
  title={Semiclassical theory of spin-polarized shot noise in mesoscopic diffusive conductors},
  volume={71},
  journal={Physical Review B},
  author={Zareyan, Malek and Belzig, Wolfgang},
  note={Article Number: 184403}
}
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    <dcterms:abstract xml:lang="eng">We study fluctuations of spin-polarized currents in a three-terminal spin-valve system consisting of a diffusive normal metal wire connected by tunnel junctions to three ferromagnetic terminals. Based on a spin-dependent Boltzmann-Langevin equation, we develop a semiclassical theory of charge and spin currents and the correlations of the currents fluctuations. In the three terminal system, we show that current fluctuations are strongly affected by the spin-flip scattering in the normal metal and the spin polarizations of the terminals, which may point in different directions. We analyze the dependence of the shot noise and the cross-correlations on the spin-flip scattering rate in the full range of the spin polarizations and for different magnetic configurations. Our result demonstrate that noise measurements in multi-terminal devices allow to determine the spin-flip scattering rate by changing the polarizations of ferromagnetic terminals.</dcterms:abstract>
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