Spin-injection Hall effect in a planar photovoltaic cell
| Autor: | Liviu P. Zârbo, Byong-Guk Park, Xiulai Xu, Jairo Sinova, Tomas Jungwirth, Jörg Wunderlich, Andrew C. Irvine, Bernd Kaestner, Vít Novák |
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| Rok vydání: | 2009 |
| Předmět: |
Physics
Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Spintronics Condensed Matter::Other business.industry Thermal Hall effect FOS: Physical sciences General Physics and Astronomy Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter::Materials Science Computer Science::Emerging Technologies Semiconductor Hall effect Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Spin Hall effect Optoelectronics Electronics Photonics business Quantum well |
| Zdroj: | Nature Physics. 5:675-681 |
| ISSN: | 1745-2481 1745-2473 |
| DOI: | 10.1038/nphys1359 |
| Popis: | Successful incorporation of the spin degree of freedom in semiconductor technology requires the development of a new paradigm allowing for a scalable, non-destructive electrical detection of the spin-polarization of injected charge carriers as they propagate along the semiconducting channel. In this paper we report the observation of a spin-injection Hall effect (SIHE) which exploits the quantum-relativistic nature of spin-charge transport and which meets all these key requirements on the spin detection. The two-dimensional electron-hole gas photo-voltaic cell we designed to observe the SIHE allows us to develop a quantitative microscopic theory of the phenomenon and to demonstrate its direct application in optoelectronics. We report an experimental realization of a non-magnetic spin-photovoltaic effect via the SIHE, rendering our device an electrical polarimeter which directly converts the degree of circular polarization of light to a voltage signal. Comment: 14 pages, 4 figures |
| Databáze: | OpenAIRE |
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