Ultrafast destruction and recovery of the spin density wave order in iron-based pnictides: A multipulse optical study

M. Naseska, A. Pogrebna, G. Cao, Z. A. Xu, D. Mihailovic, and T. Mertelj
Phys. Rev. B 98, 035148 – Published 30 July 2018
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  • INTRODUCTION
  • EXPERIMENT
  • STANDARD PUMP-PROBE RESULTS
  • MULTIPULSE RESULTS
  • ANALYSIS AND DISCUSSION
  • SUMMARY AND CONCLUSIONS
  • ACKNOWLEDGMENTS
  • APPENDICES
    • References

    Abstract

    We report on a systematic excitation-density-dependent all-optical femtosecond time-resolved study of the spin density wave state in iron-based superconductors. The destruction and recovery dynamics are measured by means of the standard and a multipulse pump-probe technique. The experimental data are analyzed and interpreted in the framework of an extended three-temperature model. The analysis suggests that the optical-phonon energy relaxation plays an important role in the recovery of almost exclusively electronically driven spin density wave order.

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    • Received 16 April 2018
    • Revised 13 July 2018

    DOI:https://doi.org/10.1103/PhysRevB.98.035148

    ©2018 American Physical Society

    Physics Subject Headings (PhySH)

    1. Research Areas
    Dynamical phase transitionsMagnetic phase transitionsSpin density waves
    1. Physical Systems
    Iron-based superconductorsPnictides
    1. Techniques
    Femtosecond laser irradiationFemtosecond laser spectroscopyOptical spectroscopyTime-resolved reflection spectroscopyUltrafast pump-probe spectroscopy
    Condensed Matter, Materials & Applied Physics

    Authors & Affiliations

    M. Naseska1, A. Pogrebna1,2, G. Cao3, Z. A. Xu3, D. Mihailovic1,4, and T. Mertelj1,4,*

    • 1Complex Matter Department, Jozef Stefan Institute, Jamova 39, Ljubljana, SI-1000 Ljubljana, Slovenia
    • 2Institute for Molecules and Materials, Radboud University, Nijmegen 6525 AJ, The Netherlands
    • 3Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China
    • 4CENN Nanocenter, Jamova 39, Ljubljana SI-1000, Slovenia

    • *tomaz.mertelj@ijs.si

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    Issue

    Vol. 98, Iss. 3 — 15 July 2018

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