Temperature induced spin coherence dissipation in quantum dots

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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 a microsecond scale for temperatures below 20 K, for higher temperatures it shows a surprisingly sharp drop into the nanoseconds range. The decrease cannot be explained through inelastic scattering with phonons, and may be related with elastic scattering due to phonon-mediated fluctuations of the hyperfine interaction.
4 pages, 2 figures

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Materials Science

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http://salesiana.dossiersoluciones.com/handle/123456789/164712

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0803.1579
 http://arxiv.org/abs/0803.1579
 Phys. Rev. B 78, 041303(R) (2008)
 doi:10.1103/PhysRevB.78.041303

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arXiv