Raman measurements on Sr<sub>2</sub>IrO<sub>4</sub> grown in magnetic field

ORAL

Abstract

Recent experiments found a massive reduction in the low-temperature resistivity in Sr2IrO4 when the crystals were grown in the presence of a magnetic field. Here I will present a comparison of Raman scattering data from normal and field-grown Sr2IrO4. The main differences between the two appeared in scattering from magnetic excitations. Two-magnon scattering was significantly broader in the field-grown sample and exhibited unusual temperature dependence. Scattering from single magnons, clearly visible in the normal sample, was completely absent in the field-grown sample down to an energy of at most 5 cm-1. Latest results including on doped samples will be presented.

*Work at the University of Colorado was supported by the NSF under Grant No. DMR-1410111

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Presenters

  • Nick Pellatz

    • University of Colorado, Boulder
    • Physics, University of Colorado, Boulder

Authors

  • Nick Pellatz

    • University of Colorado, Boulder
    • Physics, University of Colorado, Boulder

  • Dmitry Reznik

    • University of Colorado, Boulder
    • University of Colorado at Boulder
    • Physics, University of Colorado, Boulder

  • Gang Cao

    • University of Colorado, Boulder
    • Department of Physics, University of Colorado at Boulder
    • Physics Department, University of Colorado Boulder
    • Physics, University of Colorado, Boulder
    • University of Colorado at Boulder
    • Physics, University of Colorado Boulder