Spin and Charge Shot Noise in Mesoscopic Spin Hall Systems
arXiv:0804.2076 · doi:10.1209/0295-5075/84/37004
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.
5 pages, 2 figures (5 embedded EPS files)
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Cited by in corpus (6)
- Shot Noise Induced by Nonequilibrium Spin Accumulation
- Spin Accumulation in Diffusive Conductors with Rashba and Dresselhaus Spin-Orbit Interaction
- Measuring Spin Accumulations with Current Noise
- What can we learn about the dynamics of transported spins by measuring shot noise in spin-orbit-coupled nanostructures?
- Spin Accumulation Encoded in Electronic Noise for Mesoscopic Billiards with Finite Tunneling Rates
- Detecting Spin Transport in Quantum Magnets with Photons