Enhancement of polarization in a spin-orbit coupling quantum wire with a constriction

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dc.creatorLiu, Jun-Feng
dc.creatorZhong, Zhi-Cheng
dc.creatorChen, Lei
dc.creatorLi, Dingping
dc.creatorZhang, Chao
dc.creatorMa, Zhongshui
dc.date2007-09-03
dc.date.accessioned2026-07-07T10:07:34Z
dc.date.available2026-07-07T10:07:34Z
dc.descriptionWe investigate the enhancement of spin polarization in a quantum wire in the presence of a constriction and a spin-orbit coupling segment. It is shown that the spin-filtering effect is significantly heightened in comparison with the configuration without the constriction. It is understood in the studies that the constriction structure plays a critical role in enhancing the spin filtering by means of confining the incident electrons to occupy one channel only while the outgoing electrons occupy two channels. The enhancement of spin-filtering has also been analyzed within the perturbation theory. Because the spin polarization arises mainly from the scattering between the constriction and the segment with spin-orbit coupling, the sub-band mixing induced by spin-orbit interaction in the scattering process and the interferences result in higher spin-filtering effect.
dc.description8 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/0709.0203
dc.identifierhttp://arxiv.org/abs/0709.0203
dc.identifierPhys. Rev. B 76, 195304 (2007)
dc.identifierdoi:10.1103/PhysRevB.76.195304
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/170684
dc.subjectMesoscale and Nanoscale Physics
dc.titleEnhancement of polarization in a spin-orbit coupling quantum wire with a constriction
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