Abstract：
:We investigated the dynamics of the interaction between spin-polarized photo-created carriers and Mn ions on InGaAs/GaAs: Mn structures. The carriers are confined in an InGaAs quantum well and the Mn ions come from a Mn delta-layer grown at the GaAs barrier close to the well. Even though the carriers and the Mn ions are spatially separated, the interaction between them is demonstrated by time-resolved spin-polarized photoluminescence measurements. Using a pre-pulse laser excitation with an opposite circular-polarization clearly reduces the polarization degree of the quantum-well emission for samples where a strong magnetic interaction is observed. The results demonstrate that the Mn ions act as a spin-memory that can be optically controlled by the polarization of the photocreated carriers. On the other hand, the spin-polarized Mn ions also affect the spin-polarization of the subsequently created carriers as observed by their spin relaxation time. These effects fade away with increasing time delays between the pulses as well as with increasing temperatures.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Balanta MA,Brasil MJ,Iikawa F,Mendes UC,Brum JA,Danilov YA,Dorokhin MV,Vikhrova OV,Zvonkov BNdoi
10.1038/srep24537subject
Has Abstractpub_date
2016-04-15 00:00:00pages
24537issn
2045-2322pii
srep24537journal_volume
6pub_type
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