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arXiv · 0907.4321

Room temperature Giant Spin-dependent Photoconductivity in dilute nitride semiconductors

F. Zhao·A. Balocchi·A. Kunold·J. Carrey·H. Carrère·T. Amand·N. Ben Abdallah·J. C. Harmand·X. Marie
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Abstract

By combining optical spin injection techniques with transport spectroscopy tools, we demonstrate a spin-photodetector allowing for the electrical measurement and active filtering of conduction band electron spin at room temperature in a non-magnetic GaAsN semiconductor structure. By switching the polarization of the incident light from linear to circular, we observe a Giant Spin-dependent Photoconductivity (GSP) reaching up to 40 % without the need of an external magnetic field. We show that the GSP is due to a very efficient spin filtering effect of conduction band electrons on Nitrogen-induced Ga self-interstitial deep paramagnetic centers.

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F. Zhao, A. Balocchi, A. Kunold, J. Carrey, H. Carrère, T. Amand, N. Ben Abdallah, J. C. Harmand, X. Marie. 2010-03-01. Room temperature Giant Spin-dependent Photoconductivity in dilute nitride semiconductors. https://doi.org/10.1063/1.3273393

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