Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-02-20
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
10 pages, 2 figures
Scientific paper
A simple model of circular polarization dependence on Mn delta-layer position in LED heterostructures with InGaAs/GaAs quantum well is proposed, being able to explain quite accurately recent fascinating experimental results [S.V. Zaitsev, et al., Physica E (2009), doi:10.1016/j.physe.2008.11.003]. The model emphasizes the role of position-dependent exchange interaction between injected holes and Mn spins which significantly affects the hole level splitting in a magnetic field, leading to strong variations of polarization dependence. The role of effective temperature corresponding to the injected hole energy and the broadening caused by the geometrical structure imperfections is also discussed.
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