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Type: Artigo de periódico
Title: Temperature-induced Spin-coherence Dissipation In Quantum Dots
Author: Hernandez F.G.G.
Greilich A.
Brito F.
Wiemann M.
Yakovlev D.R.
Reuter D.
Wieck A.D.
Bayer M.
Abstract: The temperature dependence of electron-spin coherence in singly negatively charged (In,Ga)As/GaAs quantum dots is studied by time-resolved Faraday rotation. The decoherence time T2 is constant on the microsecond scale for temperatures below 15 K; for higher temperatures it shows a surprisingly sharp drop into the nanosecond range. The decrease cannot be explained through inelastic scattering with phonons, and it may be related to elastic scattering due to phonon-mediated fluctuations of the hyperfine interaction. © 2008 The American Physical Society.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.78.041303
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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