Nonequilibrium dynamics of local lattice distortions in FeSe

ORAL

Abstract

The role of the lattice in unique properties of iron-based superconductors, such as electronic nematicity, is still unclear. This rises an interest in investigating the local structure modifications during the phase transitions in these materials. We report the study of the local crystal structure of FeSe and its connection to electronic nematicity using ultrafast electron diffraction, x-ray diffraction, and transmission electron microscopy. The study reveals the local distortions in form of iron dimers, ordered within nanometrer -sized domains. The observed nonequilibrium lattice dynamics implies sensitivity of the lattice distortions to the nematic order parameter.

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Presenters

  • Tatiana Konstantinova

    CMPMSD, Brookhaven National Laboratory

Authors

  • Tatiana Konstantinova

    CMPMSD, Brookhaven National Laboratory

  • Lijun Wu

    Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Brookhaven National Laboratory, CMPMSD, Brookhaven National Laboratory, 2Condensed Matter Physics and Materials Science Departement, Brookhaven National Laboratory

  • Milinda Abeykoon

    Brookhaven National Laboratory, CMPMSD, Brookhaven National Laboratory

  • Cedomir Petrovic

    CMPMS, Brookhaven National Laboratory, Brookhaven National Laboratory, CMPMSD, Brookhaven National Laboratory, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory

  • Xijie Wang

    SLAC National Accelerator Laboratory, SLAC

  • Yimei Zhu

    Department of Energy Science and Technology, Upton, New York 11973, USA, Brookehaven National Laboratory, Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Brookhaven National Laboratory, CMPMSD, Brookhaven National Laboratory, 2Condensed Matter Physics and Materials Science Departement, Brookhaven National Laboratory

  • Aifeng Wang

    Brookhaven National Laboratory, CMPMSD, Brookhaven National Laboratory