Hole spin injection from a GaMnAs layer into GaAs-AlAs-InGaAs resonant tunneling diodes

We have investigated the polarization-resolved electroluminescence (EL) of a p–i–n GaAs/AlAs/InGaAs resonant tunneling diode (RTD) containing a GaMnAs (x  =  5%) spin injector under high magnetic fields. We demonstrate that under hole resonant tunneling condition, the GaMnAs contact acts as an effic...

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Bibliographic Details
Main Authors: Rodrigues, D.H., Brasil, M.J.S.P., Orlita, M., Kunc, J., Galeti, H.V.A., Henini, M., Taylor, D., H.V.A., Y.G.
Format: Article
Published: IOP Publishing 2016
Online Access:https://eprints.nottingham.ac.uk/39519/
Description
Summary:We have investigated the polarization-resolved electroluminescence (EL) of a p–i–n GaAs/AlAs/InGaAs resonant tunneling diode (RTD) containing a GaMnAs (x  =  5%) spin injector under high magnetic fields. We demonstrate that under hole resonant tunneling condition, the GaMnAs contact acts as an efficient spin-polarized source for holes tunneling through the device. Polarization degrees up to 80% were observed in the device around the hole resonance at 2 K under 15 T. Our results could be valuable for improving the hole-spin injection in GaMnAs-based spintronic devices.