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Control of spin functionality in ZnMnSe-based structures: Spin switching versus spin alignment
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16.The commonly accepted notation is used here to describe the exciton states.
17.Detailed information on intermediate physical processes during the spin injection, as being due to spin-preserved transport of the exciton as a whole or one of the particles of the exciton, cannot unfortunately be provided from the present cw optical studies. For that substantial efforts from ultrafast transient optical studies are required. This issue is beyond the scope of the letter, however, and will not affect our main conclusion of the letter, i.e., the spin functionality can be controlled by structural design.
18.The degree of PL polarization reaches ±30% if the contribution from a background signal due to direct optical excitation of the nonmagnetic QW is subtracted. This limited value of polarization is likely caused by spin scattering at the interface and spin relaxation during energy relaxation within the QW.
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