Mesoscopic fluctuations of spin currents
arXiv:0706.3529 · doi:10.1088/1367-2630/9/9/352
Abstract
Spin currents may be generated by applying bias voltages V to the nanostructures even in the absence of spin-active ferromagnetic interfaces. Most theoretical proposals concentrate on a concrete spin-orbit interaction and on the disorder-averaged effect. It remains underappreciated that any spin-orbit interaction produces random spin currents with a typical amplitude e^2 V/\hbar not affected by disorder. This work addresses such mesoscopic fluctuations of spin currents for generic model of a nanostructure where several quantum connectors meet in a single node. The analysis is performed in the framework of recently developed quantum circuit theory of G_Q corrections and reveals four distinct mechanisms of spin current fluctuations. The results are elaborated for simple models of tunnel and ballistic connectors.
13 pages, submitted to New J.P
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Cited by in corpus (10)
- Spin Accumulation in Diffusive Conductors with Rashba and Dresselhaus Spin-Orbit Interaction
- Generation and Detection of Spin Currents in Semiconductor Nanostructures with Strong Spin-Orbit Interaction
- Electrical probing of the spin conductance of mesoscopic cavities
- Generalized correlation functions for conductance fluctuations and the mesoscopic spin Hall effect
- Flows of Renyi entropies
- Spin-to-Charge Conversion of Mesoscopic Spin Currents
- Geometric Correlations and Breakdown of Mesoscopic Universality in Spin Transport
- Universal Features of Spin Transport and Breaking of Unitary Symmetries
- Scattering Theory of Current-Induced Spin Polarization
- Thermoelectric unipolar spin battery in a suspended carbon nanotube