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Laser-Controlled Magnetization in a Single Magnetic Semiconductor Quantum Dot

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Abstract

The photoluminescene signal of individual semimagnetic CdSe–Zn0.75Mn0.25Se quantum dots is used to study the magnetization of the Mn2+ spin system in the exchange field of a single exciton. We demonstrate that by increasing the laser excitation power a significant blue shift of the photoluminescence signal occurs. This is attributed to a laser-induced demagnetization, i.e. the laser-generated carriers heat the Mn2+ spin system via spin–flip exchange scattering.

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Authors and Affiliations

  1. Technische Physik, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany

    H. Schömig, G. Bacher & A. Forchel

  2. Department of Physics, University of Notre Dame, Notre Dame, Indiana, 46556

    S. Lee, M. Dobrowolska & J. K. Furdyna

  3. Department of Electronic Materials Engineering, Kwangwoon University, Seoul, 139-701, Korea

    S. Lee

Authors
  1. H. Schömig
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  2. G. Bacher
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  3. A. Forchel
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  4. S. Lee
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  5. M. Dobrowolska
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  6. J. K. Furdyna
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Schömig, H., Bacher, G., Forchel, A. et al. Laser-Controlled Magnetization in a Single Magnetic Semiconductor Quantum Dot. Journal of Superconductivity 16, 379–382 (2003). https://doi.org/10.1023/A:1023694210050

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