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Photoexcited Spin States in Diluted Magnetic Semiconductor Quantum Structures by S. Takeyama; H. Mino; S. Adachi; T. Stirner; W.E. Hagston; H. Yokoi; Yu.G. Semenov; S.W. Tozer; Y. Kim; G. Karczewski; J. Kossut is a Physics and Astronomy article available to read on EtoBox.

What is Photoexcited Spin States in Diluted Magnetic Semiconductor Quantum Structures about?

Exciton photoluminescence in a diluted magnetic asymmetric quantum well has given clear evidence of `asymmetric exciton magnetic polaron statesa in magnetic "elds. The theoretical calculation to interpret the observed magneto-optical data has clari"ed the importance of exciton localization associated with the interface disorder and the alloy potential #uctuation in addition to the exciton magnetic polaron formation in the asymmetric diluted magnetic barrier. The possibility of a `bifurcateda exciton states is discussed. The transient four-wave-mixing nonlinear spin selective optical measurements revealed the spin-structure of excitons and biexcitons in diluted magnetic quantum structures. The e!ects of the magnetic "eld on biexciton states have been investigated. The photoluminescence transition from the biexciton to exciton states has been investigated in magnetic "elds, and the stability of the biexciton states in either bonding (spin singlet) or anti-bonding states (spin triplet) is discussed. We have proposed methods to deduce the interface magnetism in the diluted magnetic quantum structures from the high-"eld Zeeman splitting of exciton photoluminescence up to 60 T.

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Author

S. Takeyama; H. Mino; S. Adachi; T. Stirner; W.E. Hagston; H. Yokoi; Yu.G. Semenov; S.W. Tozer; Y. Kim; G. Karczewski; J. Kossut

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-4526)

Published

2001

Language

EN

Field

Physics and Astronomy (Physical Sciences)