Optical Spin Orientation in Strained Superlattices

Details Optical Spin Orientation in Strained Superlattices Optical Spin Orientation in Strained Superlattices

2003-12-31

arxiv.org/abs/cond-mat/0312719v1

Physics

Condensed Matter

Materials Science

20 pages, 8 figures

Scientific paper

10.1063/1.1763238

Optical orientation in the strained semiconductor superlattices is investigated theoretically. The dependence of the features in spin-polarization spectra on the structure parameters is clarified. The value of polarization in the first polarization maximum in the SL structures is shown to grow with the splitting between the hh- and lh- states of the valence band, the joint strain and confinement effects on the hh1- lh1 splitting being strongly influenced by the tunneling in the barriers. In strained structures with high barriers for the holes initial polarization can exceed 95 %. Calculated polarization spectra are close to the experimental spectra of polarized electron emission.

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