Phonon-Induced Efficient Transfer of Spin-Polarized Excitons in Diluted Magnetic Semiconductor Double Quantum Wells
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概要
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We demonstrate the efficient transfer of spin-polarized excitons in diluted magnetic semiconductor (DMS) double quantum wells (QWs), where the spin-polarized excitons tunnel from the bottom of a non magnetic QW into a DMS-QW across a tunneling barrier and subsequently relax to the exciton ground state in the DMS-QW with phonon emissions. The exciton-transfer time decreases significantly when the exciton energy difference between both wells is equal to the energy of one longitudinal optical (LO) phonon. This observation indicates that the exciton spin transfer can be accelerated with the conservation of the spin polarization by the energy relaxation with the LO-phonon emission immediately after the tunneling.
- 2007-11-15
著者
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Souma Izuru
Institute Of Multidisciplinary Research For Advanced Materials Tohoku University
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Murayama Akihiro
Institute Of Multidisciplinary Research For Advanced Materials Tohoku University
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Murayama Akihiro
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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Park Jiho
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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Oka Yasuo
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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Saito Kazuya
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
関連論文
- Fabrication and Magnetooptical Properties of Nanostructures of Diluted Magnetic Semiconductors Integrated with Glass Thin Films
- Fabrication and Magnetooptical Properties of Nanostructures of Diluted Magnetic Semiconductors Integrated with Glass Thin Films
- Phonon-Induced Efficient Transfer of Spin-Polarized Excitons in Diluted Magnetic Semiconductor Double Quantum Wells
- Spin-Conserving Tunneling of Excitons in Diluted Magnetic Semiconductor Double Quantum Wells