Temperature Dependence of the Phase Coherence Length of High-Mobility AlGaAs/GaAs Quantum-Wire Rings
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概要
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The temperature dependence of the phase coherence length, L_φ, of high-mobility AlGaAs/GaAs quantum-wire rings was investigated through the Aharonov-Bohm (AB) magnetoresistance oscillations. The expression of the AB oscillation amplitude for the quasiballistic, multitransverse-mode quantum-wire rings was derived and used to extract L_φ from the experimental AB oscillation amplitudes. The phase coherence time, τ_φ, was estimated from L_φ using an expression for an intermediated region. It was found that below 2.0 K, L_φ saturates at 2.5μm and τ_φ saturates at 24 ps. The temperature dependence of τ_φ showed approximately T^<-2> dependence above 2.0 K, which is characteristic of electron-electron scattering in a pure system.
- 社団法人応用物理学会の論文
- 1991-09-15
著者
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IWADATE Kazumi
NTT LSI Laboratories
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Yamamoto M
Ntt Electronics Technology Corporation
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Yamamoto Masafumi
Ntt Lsi Laboratories
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Mizutani Takashi
Ntt Lsi Laboratories
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Aihara K
Hitachi Research Laboratory Hitachi Ltd.
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AIHARA Kimihisa
NTT LSI Laboratories
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