Spin and charge shot noise in mesoscopic spin Hall systems

被引：6

作者：

Dragomirova, R. L. ^{[1
]}

Zarbo, L. P. ^{[1
]}

Nikolic, B. K. ^{[1
]}

机构：

[1] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

来源：

EPL | 2008年 / 84卷 / 03期

关键词：

D O I：

10.1209/0295-5075/84/37004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 SO scattering off extrinsic impurities is responsible not only for the pure spin Hall current in the transverse leads, but also for non-equilibrium 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 current and zero charge current, or transverse spin current and non-zero charge Hall current, driven by unpolarized or spin-polarized injected longitudinal charge current, respectively. Since any spin-flip acts as an additional source of noise, we argue that these shot noises provide a unique experimental tool to differentiate between intrinsic and extrinsic SO mechanisms underlying the spin Hall effect in paramagnetic devices. Copyright (C) EPLA, 2008

引用

页数：6

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