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Spin‐Dependent Carrier Confinements and Radiative Recombinations in Zn 1–x Mn x Te/Zn 1–y Mg y Te Spin Superlattices
Author(s) -
Debnath M.C.,
Chen Z.H.,
Kayanuma K.,
Souma I.,
Sato K.,
Murayama A.,
Oka Y.
Publication year - 2002
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200201)229:2<695::aid-pssb695>3.0.co;2-s
Subject(s) - superlattice , condensed matter physics , photoluminescence , zeeman effect , spin (aerodynamics) , spin polarization , exciton , magnetic field , materials science , electron , physics , optoelectronics , quantum mechanics , thermodynamics
The properties of carrier confinement in Zn 0.950 Mn 0.050 Te/Zn 0.965 Mg 0.035 Te spin superlattices have been studied by transient photoluminescence in magnetic field at various temperatures. The polarization characteristics of asymmetric Zeeman splitting, the increased photoluminescence intensity and the enhanced exciton lifetime are assigned to the evidence of spin superlattices. The type‐I optical transition for the electron and hole spin states is realized by the formation of spin superlattices due to the magnetic‐field‐induced confinement of the band potential. The radiative recombination process dominates at 4.2–30 K in the present spin superlattice structure.