Time-resolved optical study of magnetism in Sr2IrO4

ORAL

Abstract

We report a time-resolved optical pump-probe study of the Jeff=1/2 Mott insulator Sr2IrO4. The temperature dependence of the electronic relaxation rate exhibits clear anomalies at magnetic ordering temperatures of 240K and 100K, which are consistent with the development of bulk decay channels via emission of magnetic excitations. We will then discuss time-resolved second harmonic generation studies and contrast the magnetic properties of the surface and the bulk.

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Authors

  • David Hsieh

    • MIT

  • Darius Torchinsky

    • MIT
    • Department of Physics, Massachusetts Institute of Technology, Cambridge MA 02139

  • Fahad Mahmood

    • MIT
    • Department of Physics, Massachusetts Institute of Technology, Cambridge MA 02139

  • G. Cao

    • Center for Advanced Materials, University of Kentucky
    • University of Kentucky

  • Nuh Gedik

    • MIT
    • Department of Physics, Massachusetts Institute of Technology, Cambridge MA 02139
    • Massachusetts Institute of Technology