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Type: Artigo de periódico
Title: Spin-orbit Dependence On Carrier Momentum In (1 1 0) Gaas Quantum Wells
Author: Couto Jr. O.D.D.
Rudolph J.
Iikawa F.
Hey R.
Santos P.V.
Abstract: Surface acoustic waves (SAW) are employed to transport optically generated spin ensembles over distances exceeding 60 μ m in (1 1 0) GaAs quantum wells (QW). The dependence of the spin-orbit (SO) coupling on carrier momentum is investigated by using SAWs to transport spins with well-defined velocity along different directions in the QW plane. For transport along the [0 0 1] direction, the high relaxation rates for the in-plane spin component lead to fast spin decoherence under a magnetic field. For the [over(1, -) 1 0] direction, in contrast, a non-zero average value of the SO internal magnetic field retards the longitudinal spin relaxation. © 2007 Elsevier B.V. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/j.physe.2007.08.116
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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