Back to Search Start Over

Spin and Charge Shot Noise in Mesoscopic Spin Hall Systems

Authors :
Dragomirova, R. L.
Zarbo, L. P.
Nikolic, B. K.
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)

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