2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/164712The 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 figuresMaterials Sciencetext