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Type: Artigo de periódico
Title: Compensation effect on the CW spin-polarization degree of Mn-based structures
Author: Balanta, MAG
Brasil, MJSP
Iikawa, F
Mendes, UC
Brum, JA
Maialle, MZ
Danilov, YA
Vikhrova, OV
Zvonkov, BN
Abstract: We investigated the effects of Mn ions on the spin dynamics of electrons confined in a semiconductor quantum well nearby a Mn-based ferromagnetic layer. Circularly polarized Hanle and time-resolved photoluminescence (PL) measurements were carried out on a set of samples with different Mn delta-doping concentrations. We observe a strong influence of the Mn layer for both the electron lifetime and its spin-relaxation time for high-Mn concentrations, when the electrons significantly overlap with Mn ions. Our results also show that the circular-polarization degree obtained by simple continuous-wave PL measurements is not sufficient to determine the relaxation dynamics due to a compensation effect of the lifetime and the spin-relaxation time.
Country: Inglaterra
Editor: Iop Publishing Ltd
Citation: Journal Of Physics D-applied Physics. Iop Publishing Ltd, v. 46, n. 21, 2013.
Rights: fechado
Identifier DOI: 10.1088/0022-3727/46/21/215103
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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