Voltage- and light-controlled spin properties of a two-dimensional hole gas in p-type GaAs/AlAs resonant tunneling diodes

Galeti, H.V.A.; Galvao Gobato, Y.; Brasil, M.J.S.P.; Taylor, D.; Henini, M.

Abstract

We have investigated the spin properties of a two-dimensional hole gas (2DHG) formed at the contact layer of a p-type GaAs/AlAs resonant tunneling diode (RTD). We have measured the polarized-resolved photoluminescence of the RTD as a function of bias voltage, laser intensity and external magnetic field up to 15T. By tuning the voltage and the laser intensity, we are able to change the spin-splitting from the 2DHG from almost 0 meV to 5 meV and its polarization degree from − 40% to + 50% at 15T. These results are attributed to changes of the local electric field applied to the two-dimensional gas which affects the valence band and the hole Rashba spin–orbit effect.

Citation

Galeti, H., Galvao Gobato, Y., Brasil, M., Taylor, D., & Henini, M. (in press). Voltage- and light-controlled spin properties of a two-dimensional hole gas in p-type GaAs/AlAs resonant tunneling diodes. Journal of Electronic Materials, 47(3), https://doi.org/10.1007/s11664-018-6065-4

• Journal Article Type: Article
• Acceptance Date: Jan 4, 2018
• Online Publication Date: Jan 16, 2018
• Deposit Date: Jan 23, 2018
• Publicly Available Date: Jan 17, 2019
• Journal: Journal of Electronic Materials
• Print ISSN: 0361-5235
• Electronic ISSN: 1543-186X
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 47
• Issue: 3
• DOI: https://doi.org/10.1007/s11664-018-6065-4
• Keywords: Two-dimensional hole gas; Spintronics; Resonant tunnelling diodes; Photoluminescence
• Public URL: https://nottingham-repository.worktribe.com/output/905693
• Publisher URL: https://link.springer.com/article/10.1007%2Fs11664-018-6065-4
• Additional Information: This is a post-peer-review, pre-copyedit version of an article published in Journal of Electronic Materials. The final authenticated version is available online at: http://dx.doi.org/10.1007/s11664-018-6065-4