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arXiv · 1301.4149

Temperature dependence of hole spin coherence in (In,Ga)As quantum dots measured by mode-locking and echo techniques

S. Varwig·A. René·A. Greilich·D. R. Yakovlev·D. Reuter·A. D. Wieck·M. Bayer
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Abstract

The temperature dependence of the coherence time of hole spins confined in self-assembled (In,Ga)As/GaAs quantum dots is studied by spin mode-locking and spin echo techniques. Coherence times limited to about a \mu s are measured for temperatures below 8 K. For higher temperatures a fast drop occurs down to a few ns over a 10 K range. The hole-nuclear hyperfine interaction appears too weak to account for these limitations. We suggest that spin-orbit related interactions are the decisive sources for hole spin decoherence.

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S. Varwig, A. René, A. Greilich, D. R. Yakovlev, D. Reuter, A. D. Wieck, M. Bayer. 2013-01-17. Temperature dependence of hole spin coherence in (In,Ga)As quantum dots measured by mode-locking and echo techniques. https://doi.org/10.1103/physrevb.87.115307

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