Raman Spectroscopy Study of Charge Order Excitations in Metallic (Sr<sub>1-x</sub>La<sub>x</sub>)<sub>3</sub>Ir<sub>2</sub>O<sub>7</sub>

ORAL

Abstract

Charge order has been universally observed in underdoped copper-oxide based high-Tc superconductors (cuprates) and shown to compete with superconductivity. In a strong spin orbit coupled cuprate analogue system, layered perovskite iridium oxides (iridates), Mott insulating, pseudogap and d-wave gap behaviors have been discovered in the single layer variant Sr2IrO4, while metal insulator transition and charge-order like Fermi surface instability has only been seen in the bilayer counterpart Sr3Ir2O7. However, a full symmetry characterization on the charge order in Sr3Ir2O7 is yet missing, making its analogy to the charge order in cuprates incomplete. In this talk, I will show our evidence of the charge order excitation and the identification of its symmetry. I will also discuss its significance in comparison with the charge order in cuprates.

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Presenters

  • Wencan Jin

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

Authors

  • Wencan Jin

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

  • Siwen Li

    • 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

  • 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

  • Jianpeng Liu

    • Kavli Institute for Theoretical Physics, UC Santa Barbara
    • KITP, Univ of California - Santa Barbara
    • University of California, Santa Barbara
    • Kavli Institute of Theoretical Physics, UCSB

  • Qiang Han

    • Rutgers Univ
    • Rutgers University

  • 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

  • Roberto Merlin

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

  • Liuyan Zhao

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