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Modeling of diffusion of injected electron spins in spin-orbit coupled microchannels

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dc.creator Zarbo, Liviu P. en_US
dc.creator Sinova, Jairo en_US
dc.creator Knezevic, I. en_US
dc.creator Wunderlich, J. en_US
dc.creator Jungwirth, T. en_US
dc.date.accessioned 2012-09-19T20:05:47Z
dc.date.available 2012-09-19T20:05:47Z
dc.date.issued 2010 en_US
dc.identifier.citation Liviu P. Zarbo, Jairo Sinova, I. Knezevic, J. Wunderlich and T. Jungwirth. Phys.Rev.B 82 205320 2010."Copyright (2010) by the American Physical Society." en_US
dc.identifier.uri http://dx.doi.org/10.1103/PhysRevB.82.205320 en_US
dc.identifier.uri http://hdl.handle.net/1969.1/146834
dc.description Journals published by the American Physical Society can be found at http://journals.aps.org/ en_US
dc.description.abstract We report on a theoretical study of spin dynamics of an ensemble of spin-polarized electrons injected in a diffusive microchannel with linear Rashba and Dresselhaus spin-orbit coupling. We explore the dependence of the spin-precession and spin-diffusion lengths on the strengths of spin-orbit interaction and external magnetic fields, microchannel width, and orientation. Our results are based on numerical Monte Carlo simulations and on approximate analytical formulas both treating the spin-dynamics quantum mechanically. We conclude that spin-diffusion lengths comparable or larger than the precession length occur (i) in the vicinity of the persistent spin helix regime for arbitrary channel width and (ii) in channels of similar or smaller width than the precession length, independent of the ratio of Rashba and Dresselhaus fields. For similar strengths of the Rashba and Dresselhaus fields, the steady-state spin-density oscillates or remains constant along the channel for channels parallel to the in-plane diagonal crystal directions. An oscillatory spin-polarization pattern tilted by 45 with respect to the channel axis is predicted for channels along the main cubic crystal directions. For typical experimental system parameters, magnetic fields on the order of tesla are required to affect the spin-diffusion and spin-precession lengths. en_US
dc.language.iso en en_US
dc.publisher American Physical Society en_US
dc.rights This work is archived in the Texas A&M Digital Repository with the express permission of the rights holder (commonly but not always the publisher). A copy of the permission document is on file with the Texas A&M University Libraries. en_US
dc.subject MONTE-CARLO en_US
dc.subject TRANSPORT en_US
dc.subject SEMICONDUCTORS en_US
dc.subject SPINTRONICS en_US
dc.subject TRANSISTOR en_US
dc.subject Physics en_US
dc.title Modeling of diffusion of injected electron spins in spin-orbit coupled microchannels en_US
dc.type Article en_US
local.department Physics and Astronomy en_US


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