Optoelectric spin injection in semiconductor heterostructures without a ferromagnet
- 3 June 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 65 (24), 241308
- https://doi.org/10.1103/physrevb.65.241308
Abstract
We have shown that electron-spin density can be generated by a dc current flowing across a junction with an embedded asymmetric quantum well. Spin polarization is created in the quantum well by radiative electron-hole recombination when the conduction electron momentum distribution is shifted with respect to the momentum distribution of holes in the spin-split valence subbands. Spin current appears when the spin polarization is injected from the quantum well into the n-doped region of the junction. The accompanied emission of circularly polarized light from the quantum well can serve as a spin polarization detector.
Keywords
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