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Optical inter-site spin transfer probed by energy and spin-resolved transient absorption spectroscopy

Author

Listed:
  • Felix Willems

    (Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy)

  • Clemens Korff Schmising

    (Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy)

  • Christian Strüber

    (Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy)

  • Daniel Schick

    (Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy)

  • Dieter W. Engel

    (Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy)

  • J. K. Dewhurst

    (Max-Planck-Institute for Microstructure Physics)

  • Peter Elliott

    (Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy)

  • Sangeeta Sharma

    (Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy)

  • Stefan Eisebitt

    (Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy
    Technische Universität Berlin)

Abstract

Optically driven spin transport is the fastest and most efficient process to manipulate macroscopic magnetization as it does not rely on secondary mechanisms to dissipate angular momentum. In the present work, we show that such an optical inter-site spin transfer (OISTR) from Pt to Co emerges as a dominant mechanism governing the ultrafast magnetization dynamics of a CoPt alloy. To demonstrate this, we perform a joint theoretical and experimental investigation to determine the transient changes of the helicity dependent absorption in the extreme ultraviolet spectral range. We show that the helicity dependent absorption is directly related to changes of the transient spin-split density of states, allowing us to link the origin of OISTR to the available minority states above the Fermi level. This makes OISTR a general phenomenon in optical manipulation of multi-component magnetic systems.

Suggested Citation

  • Felix Willems & Clemens Korff Schmising & Christian Strüber & Daniel Schick & Dieter W. Engel & J. K. Dewhurst & Peter Elliott & Sangeeta Sharma & Stefan Eisebitt, 2020. "Optical inter-site spin transfer probed by energy and spin-resolved transient absorption spectroscopy," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-14691-5
    DOI: 10.1038/s41467-020-14691-5
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    Cited by:

    1. Sergey Zayko & Ofer Kfir & Michael Heigl & Michael Lohmann & Murat Sivis & Manfred Albrecht & Claus Ropers, 2021. "Ultrafast high-harmonic nanoscopy of magnetization dynamics," Nature Communications, Nature, vol. 12(1), pages 1-8, December.

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