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Spin and Charge Shot Noise in Mesoscopic Spin Hall Systems
- Source :
- Europhys. Lett. 84, 37004 (2008).
- Publication Year :
- 2008
-
Abstract
- Injection of unpolarized charge current through the longitudinal leads of a four-terminal two-dimensional electron gas with the Rashba spin-orbit (SO) coupling and/or SO scattering off extrinsic impurities is responsible not only for the pure spin Hall current in the transverse leads, but also for random time-dependent current fluctuations. We employ the scattering approach to current-current correlations in multiterminal nanoscale conductors to analyze the shot noise of transverse pure spin Hall and zero charge current, or transverse spin current and non-zero charge Hall current, driven by unpolarized or spin-polarized longitudinal current, respectively. Since any spin-flip acts as an additional source of noise, we argue that these shot noises offer a unique tool to differentiate between intrinsic and extrinsic SO mechanisms underlying the spin Hall effect in paramagnetic devices.<br />Comment: 5 pages, 2 figures (5 embedded EPS files)
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Europhys. Lett. 84, 37004 (2008).
- Publication Type :
- Report
- Accession number :
- edsarx.0804.2076
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1209/0295-5075/84/37004