Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 74: Correlated Electrons: Quantum Impurities, Kondo Physics

TT 74.4: Vortrag

Mittwoch, 2. April 2014, 15:45–16:00, BEY 81

Spin-noise in the anisotropic central spin model — •Johannes Hackmann and Frithjof B. Anders — Technische Universität Dortmund, Lehrstuhl für Theoretische Physik II, 44221 Dortmund

We have investigated the spin noise in an ensemble of semiconductor quantum dots (QDs) using the anisotropic central spin model. This model describes the dynamics of both electron and/or hole doped QDs. First, we have computed the spectral correlation function ⟨ S^z (ω) S^z ⟩ for a single QD to reveal the influence of the external magnetic field and the anisotropy factor on the spin dynamics. Second, we have performed an ensemble average to compare our results to recent experiments. We will show that the measurement of spin noise on an ensemble of hole doped QDs reveals more about the distribution function of the QD parameters than on the dynamics of a single QD spin.