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

doi:10.1103/PhysRevB.87.115307

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

Mesoscale and Nanoscale Physics 2014-05-13 v1 Quantum Physics

Authors: 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.

Keywords

hole spin coherence quantum dots temperature dependence spin mode-locking spin echo spin decoherence spin-orbit interaction

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@article{arxiv.1301.4149,
  title  = {Temperature dependence of hole spin coherence in (In,Ga)As quantum dots measured by mode-locking and echo techniques},
  author = {S. Varwig and A. René and A. Greilich and D. R. Yakovlev and D. Reuter and A. D. Wieck and M. Bayer},
  journal= {arXiv preprint arXiv:1301.4149},
  year   = {2014}
}

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5 pages, 4 figures

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

Abstract

Keywords

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