6533b863fe1ef96bd12c7952
RESEARCH PRODUCT
Nonlocal pure spin current injection via quantum pumping and crossed Andreev reflection
Colin BenjaminRoberta Citrosubject
SuperconductivityPhysicsQuantum PhysicsCondensed matter physicsCondensed Matter - Mesoscale and Nanoscale Physicsbusiness.industryFOS: Physical sciencesCondensed Matter PhysicsCondensed Matter::Mesoscopic Systems and Quantum Hall EffectElectronic Optical and Magnetic MaterialsAndreev reflectionCoherence lengthMagnetizationCondensed Matter::Materials ScienceSemiconductorFerromagnetismCondensed Matter::SuperconductivityMesoscale and Nanoscale Physics (cond-mat.mes-hall)Condensed Matter::Strongly Correlated ElectronsQuantum Physics (quant-ph)businessAdiabatic processQuantumdescription
A pure spin current injector is proposed based on adiabatic pumping and crossed normal/Andreev reflection. The device consists of a three-terminal ferromagnet-superconductor-semiconductor system in which the injection of a pure spin current is into the semiconductor which is coupled to the superconductor within a coherence length away from the ferromagnet enabling the phenomena of crossed normal /Andreev reflection to operate. Quantum pumping is induced by adiabatically modulating two independent parameters of the ferromagnetic lead, namely the magnetization strength and the strength of coupling between the ferromagnet and the superconductor. The competition between the normal/Andreev reflection and the crossed normal/Andreev reflection, both induced by pumping, leads to non-local injection of a pure spin current into the semiconductor. The experimental realization of the proposed device is also discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-01-01 |