Raman Spectroscopy Study of Charge Order Excitations in Metallic (Sr1-xLax)3Ir2O7

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