Interwell exciton relaxation in semimagnetic asymmetric double quantum wells View Full Text


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Article Info

DATE

2006-11

AUTHORS

S. V. Zaitsev, A. S. Brichkin, P. S. Dorozhkin, G. Bacher

ABSTRACT

The possibility of magnetic field control of the spectral and polarization characteristics of exciton recombination is examined in Cd(Mg, Mn) Te-based asymmetric double quantum wells. At low fields, the exciton transition in a semimagnetic well is higher in energy than that in a nonmagnetic well and the interwell exciton relaxation is fast. In contrast, when the energy order of the exciton transitions reverses at high fields, unexpectedly slow relaxation of σ− polarized excitons from the nonmagnetic well to the σ+-polarized ground state in the semimagnetic well is observed. Strong dependence of the total circular polarization degree on the heavy-light hole splitting Δhh-lh in the nonmagnetic well is found and attributed to the spin dependent interwell tunneling controlled by exciton spin relaxation. Such a slowing down of the relaxation allows separation of oppositely spin-polarized excitons in adjacent wells. More... »

PAGES

340-343

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s0021364006180135

DOI

http://dx.doi.org/10.1134/s0021364006180135

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1012161152


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