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Electron spin dynamics and optical orientation of Mn2+ ions in GaAs

Authors :
Manfred Bayer
Dmitri R. Yakovlev
R. I. Dzhioev
I. A. Akimov
Yu. G. Kusrayev
V. F. Sapega
V. L. Korenev
Source :
Journal of Applied Physics. 113:136501
Publication Year :
2013
Publisher :
AIP Publishing, 2013.

Abstract

We present an overview of spin-related phenomena in GaAs doped with low concentration of Mn-acceptors (below 1018 cm−3). We use the combination of different experimental techniques such as spin-flip Raman scattering and time-resolved photoluminescence. This allows to evaluate the time evolution of both electron and Mn spins. We show that optical orientation of Mn ions is possible under application of weak magnetic field, which is required to suppress the manganese spin relaxation. The optically oriented Mn2+ ions maintain the spin and return part of the polarization back to the electron spin system providing a long-lived electron spin memory. This leads to a bunch of spectacular effects such as non-exponential electron spin decay and spin precession in the effective exchange fields.

Details

ISSN :
10897550 and 00218979
Volume :
113
Database :
OpenAIRE
Journal :
Journal of Applied Physics
Accession number :
edsair.doi...........8334f054e9db7046cb0191231fcdb5c8
Full Text :
https://doi.org/10.1063/1.4795527