Enhancing the Circular Polarization of Spin Light-Emitting Diodes by Processing in Selenium Vapor
| Autor: | G. I. Kotov, V. N. Trushin, A. V. Zdoroveyshchev, P. B. Demina, A. V. Budanov, B. N. Zvonkov, Yu. N. Vlasov, M. V. Dorokhin |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Physics and Astronomy (miscellaneous) Passivation business.industry Heterojunction 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences law.invention Condensed Matter::Materials Science Semiconductor Ferromagnetism law 0103 physical sciences Optoelectronics 0210 nano-technology business Circular polarization Diode Light-emitting diode |
| Zdroj: | Technical Physics Letters. 45:235-238 |
| ISSN: | 1090-6533 1063-7850 |
| DOI: | 10.1134/s1063785019030064 |
| Popis: | Spin light-emitting diodes based on InGaAs/GaAs heterostructures with a CoPt ferromagnetic injector were fabricated. It was demonstrated that the processing of these structures in selenium vapor prior to the deposition of a CoPt contact provides an opportunity to enhance the circular polarization degree of diode emission. The observed increase in the polarization degree is attributed to the suppression of spin relaxation at the metal/semiconductor interface due to surface passivation and a reduction in the density of surface electron states as a result of processing in selenium vapor. |
| Databáze: | OpenAIRE |
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