Exciton Spin Stability in InP Quantum Dots at the Elevated Temperatures
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概要
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Exciton spin stability in InP quantum dots at the elevated temperatures is studied by measuring resonant spin orientation of excitons. With the increase of temperature, spin relaxation time becomes shorter and resonant spin orientation of excitons is reduced. It is 12 times longer than the lifetime of 260 ps at 5 K but is comparable with the lifetime around 50 K. The amplitude of the resonant spin orientation structure changes with the change of the excitation photon energy, reflecting the competition between the spin relaxation through the energy relaxation and the energy relaxation. Spin relaxation time through the energy relaxation is comparable with phonon-mediated relaxation time and is much shorter than the spin relaxation time within the bright and dark exciton states.
- 2009-04-25
著者
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Masumoto Yasuaki
Institute For Solid State Physics The University Of Tokyo
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Ikezawa Michio
Institute Of Physics And Center For Tara (tsukuba Advanced Research Alliance) University Of Tsukuba
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Kawana Keisuke
Institute of Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
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Suzuki Tsukasa
Institute of Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
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