Spin coherence of holes in GaAs/AlGaAs quantum wells

M. Syperek; D. R. Yakovlev; A. Greilich; J. Misiewicz; M. Bayer; D. Reuter; A. D. Wieck

doi:10.1103/PhysRevLett.99.187401

Spin coherence of holes in GaAs/AlGaAs quantum wells

Other Condensed Matter 2009-11-13 v1

Authors: M. Syperek , D. R. Yakovlev , A. Greilich , J. Misiewicz , M. Bayer , D. Reuter , A. D. Wieck

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Abstract

The carrier spin coherence in a p-doped GaAs/(Al,Ga)As quantum well with a diluted hole gas has been studied by picosecond pump-probe Kerr rotation with an in-plane magnetic field. For resonant optical excitation of the positively charged exciton the spin precession shows two types of oscillations. Fast oscillating electron spin beats decay with the radiative lifetime of the charged exciton of 50 ps. Long lived spin coherence of the holes with dephasing times up to 650 ps. The spin dephasing time as well as the in-plane hole g factor show strong temperature dependence, underlining the importance of hole localization at cryogenic temperatures.

Keywords

spin coherence holes GaAs/AlGaAs quantum wells Kerr rotation charged exciton spin dephasing hole localization

Cite

@article{arxiv.0704.0592,
  title  = {Spin coherence of holes in GaAs/AlGaAs quantum wells},
  author = {M. Syperek and D. R. Yakovlev and A. Greilich and J. Misiewicz and M. Bayer and D. Reuter and A. D. Wieck},
  journal= {arXiv preprint arXiv:0704.0592},
  year   = {2009}
}

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5 pages, 4 figures in PostScript format

Spin coherence of holes in GaAs/AlGaAs quantum wells

Abstract

Keywords

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