Optoelectric spin injection in semiconductor heterostructures without ferromagnet

Abstract

We have shown that electron spin density can be generated by a dc current flowing across a $pn$ 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 $pn$ junction. The accompanied emission of circularly polarized light from the quantum well can serve as a spin polarization detector.

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References in corpus (2)

• Efficient Electrical Spin Injection from a Magnetic Metal / Tunnel Barrier Contact into a Semiconductor
• Anomalous Rashba spin splitting in two-dimensional hole systems

Cited by in corpus (4)

• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
• Disentangling relativistic spin torques in a ferromagnet/semiconductor bilayer
• Co-planar spin-polarized light emitting diode