WFRF:(Toropov A.A.)
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Resonant suppression of exciton spin relaxation in Zn0.96Mn0.04Se/CdSe superlattices
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- Buyanova, Irina, 1960- (author)
- Linköpings universitet,Tekniska högskolan,Funktionella elektroniska material
- Rudko, G. Yu. (author)
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- Chen, Weimin, 1959- (author)
- Linköpings universitet,Tekniska högskolan,Funktionella elektroniska material
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- Toropov, A. A. (author)
- Sorokin, S. V. (author)
- Ivanov, S. V. (author)
- Kopev, P. S. (author)
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- (creator_code:org_t)
- AIP Publishing, 2003
- 2003
- English.
- In: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 93:10, s. 7352-
- Journal article (peer-reviewed)
Abstract
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- Spin relaxation processes in strained Zn0.96Mn0.04Se/CdSe superlattices are studied in detail by using hot photoluminescence combined with tunable excitation spectroscopy. A drastic enhancement in occupation of the upper-lying |+1/2,-3/2> state of the heavy-hole excitons is observed when excitation photon energy is resonantly tuned near an integer number of the LO phonon energy above the |+1/2,-3/2> state. Assuming the Boltzmann distribution between the excitonic states, the spin temperature of the excitons is deduced to be as high as 85 K, well above the lattice temperature of 2 K. The observed behavior provides experimental evidence for a surprisingly strong suppression of spin relaxation from the upper spin-split excitonic branch for small values of wave vector.
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- NATURVETENSKAP
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