Raman Spectroscopy Study of Magnetic Excitation across Insulator Metal Transition in (Sr<sub>1-x</sub>La<sub>x</sub>)<sub>3</sub>Ir<sub>2</sub>O<sub>7</sub>

ORAL

Abstract

Double layer perovskite iridate Sr3Ir2O7 realizes a rare spin-orbit coupled Jeff=1/2 Mott insulating ground state. Upon electron doping by La substituting Sr, a first order insulator metal transition (IMT), together with a suppression of the long-range Jeff = ½ antiferromagnetic order, has been observed. Moreover, a charge-order like Fermi surface instability has been discovered in the metallic (Sr1-xLax)3Ir2O7. Inelastic light scattering provides a useful probe on magnetic excitations and charge ordering at the same time. In this talk, we will present our Raman spectroscopy studies on the evolution of the magnetic excitation across the IMT, from x = 0 to x = 0.04, and a temperature range of 80 K to 300 K. Furthermore, we will also discuss the relationship between the magnetic excitation and the charge order excitation.

–

Presenters

  • Siwen Li

    • Physics Department, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor

Authors

  • Siwen Li

    • Physics Department, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor

  • Wencan Jin

    • University of Michigan
    • Physics Department, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor

  • Ibrahim Boulares

    • Physics Department, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor

  • Roberto Merlin

    • Physics Department, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor
    • Department of Physics, University of Michigan - Ann Arbor

  • Zach Porter

    • University of California, Santa Barbara
    • Physics, University of California, Santa Barbara
    • Materials Department, University of California, Santa Barbara

  • Christi Peterson

    • Materials Department, University of California, Santa Barbara
    • University of California, Santa Barbara

  • Stephen Wilson

    • Materials, University of California, Santa Barbara
    • Materials Department, University of California, Santa Barbara
    • University of California
    • University of California, Santa Barbara
    • Materials Department, UCSB

  • Liuyan Zhao

    • University of Michigan
    • Physics Department, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor
    • Department of Physics, University of Michigan