Fracturing the inter-plane magnetic correlation in Sr2IrO4 with single laser pulse

ORAL

Abstract

Pump and probe type experiments have been generally performed to study the non-equilibrium dynamics of the charge, spin and lattice. Besides the generally expected full recovery to the ground states after long enough time, meta-stable states, which are not available from thermal equilibrium evolution, can emerge. We show that, upon single laser pulse pumping, the 3D AFM ordering in Sr2IrO4 is fractured into lower dimension and the system enters a meta-stable state. Such effect was studied as function of laser fluence. Our results show that the in-plane spin ordering correlation length is macroscopic (micron size), and the same before and after the pumping. While the out-of-plane correlation in the meta-stable state is quickly suppressed with the increasing of laser fluence, and saturates to be about ~1 unit cell without further reduction.

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Presenters

  • Ruitang Wang

    Institute of Physics, Chinese Academy of Sciences

Authors

  • Ruitang Wang

    Institute of Physics, Chinese Academy of Sciences

  • Jiaqi Lin

    Institute of Physics, Chinese Academy of Sciences

  • Haidan Wen

    Argonne National Laboratory, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA, X-ray Science Division,, Argonne National Laboratory

  • Derek Meyers

    Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Materials Science and Engineering, University of California, Berkeley, Brookhaven National Laboratory

  • Jian Liu

    University of Tennessee, Physics, University of Tennessee, Department of Physics and Astronomy, University of Tennessee, Physics and Astronomy, Univ of Tennessee, Knoxville, Department of Physics, University of Tennessee, Knoxville, University of Tennesse, Department of Physics and Astronomy, University of Tennesse

  • Xuerong Liu

    School of Physical Science and Technology, Shanghai 201210, China, ShanghaiTech University, ShanghaiTech University, School of Physical Science and Technology, ShanghaiTech University