Spin and Charge Shot Noise in Mesoscopic Spin Hall Systems
| Autor: | Dragomirova, R. L., Zarbo, L. P., Nikolic, B. K. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Europhys. Lett. 84, 37004 (2008). |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1209/0295-5075/84/37004 |
| Popis: | 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. Comment: 5 pages, 2 figures (5 embedded EPS files) |
| Databáze: | arXiv |
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