Spin Polarized Current Generation from Quantum Dots without Magnetic Fields

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Spin Polarized Current Generation from Quantum Dots without Magnetic Fields

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dc.contributor.author Halperin, Bertrand
dc.contributor.author Krich, Jacob
dc.date.accessioned 2009-06-17T14:53:50Z
dc.date.issued 2008
dc.identifier.citation Krich, Jacob J. and Bertrand I. Halperin. 2008. Spin polarized current generation from quantum dots without magnetic fields. Physical Review B 78, no. 3: 035338. en
dc.identifier.issn 1098-0121 en
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:3110943
dc.description.abstract An unpolarized charge current passing through a chaotic quantum dot with spin-orbit coupling can produce a spin-polarized exit current without magnetic fields or ferromagnets. We use random matrix theory to estimate the typical spin polarization as a function of the number of channels in each lead in the limit of large spin-orbit coupling. We find rms spin polarizations up to 45% with one input channel and two output channels. Finite temperature and dephasing both suppress the effect, and we include dephasing effects using a variation of the third lead model. If there is only one channel in the output lead, no spin polarization can be produced, but we show that dephasing lifts this restriction. en
dc.description.sponsorship Physics en
dc.language.iso en_US en
dc.publisher American Physical Society en
dc.relation.isversionof http://dx.doi.org/10.1103/PhysRevB.78.035338 en
dc.relation.hasversion http://arxiv.org/abs/0801.2592v2 en
dash.license OAP
dc.subject spin-orbit interactions en
dc.subject spin polarised transport en
dc.subject quantum dots en
dc.title Spin Polarized Current Generation from Quantum Dots without Magnetic Fields en
dc.relation.journal Physical Review B en
dash.depositing.author Halperin, Bertrand

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