Quantum spin pumping with adiabatically modulated magnetic barrier's

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dc.creatorBenjamin, Ronald
dc.creatorBenjamin, Colin
dc.date2003-03-29
dc.date2003-12-09
dc.date.accessioned2026-07-07T06:06:28Z
dc.date.available2026-07-07T06:06:28Z
dc.descriptionA quantum pump device involving magnetic barriers produced by the deposition of ferro magnetic stripes on hetero-structure's is investigated. The device for dc- transport does not provide spin-polarized currents, but in the adiabatic regime, when one modulates two independent parameters of this device, spin-up and spin-down electrons are driven in opposite directions, with the net result being that a finite net spin current is transported with negligible charge current. We also analyze our proposed device for inelastic-scattering and spin-orbit scattering. Strong spin-orbit scattering and more so inelastic scattering have a somewhat detrimental effect on spin/charge ratio especially in the strong pumping regime. Further we show our pump to be almost noiseless, implying an optimal quantum spin pump.
dc.description14 pages, 9 figures. Manuscript revised with additional new material on spin-orbit scattering and inelastic scattering. Further new additions on noiseless pumping and analytical results with distinction between weak and strong pumping regimes. Accepted for publication in Physical Review B
dc.identifierhttps://arxiv.org/abs/quant-ph/0303176
dc.identifierhttp://arxiv.org/abs/quant-ph/0303176
dc.identifierPhys. Rev. B 69, 085318 (2004)
dc.identifierdoi:10.1103/PhysRevB.69.085318
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/90984
dc.subjectQuantum Physics
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMathematical Physics
dc.subjectPopular Physics
dc.titleQuantum spin pumping with adiabatically modulated magnetic barrier's
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