Spectroscopic evidence for electron-boson coupling in electron-doped Sr<sub>2</sub>IrO<sub>4</sub>

ORAL

Abstract

The pseudogap, d-wave superconductivity and electron-boson coupling are three intertwined key ingredients in the phase diagram of the cuprates. Sr2IrO4 is a 5d-electron counterpart of the cuprates in which both the pseudogap and a d-wave instability have been observed. Here, we report spectroscopic evidence for the presence of the third key player in electron-doped Sr2IrO4: electron-boson coupling. A kink in nodal dispersion is observed. The strength of the kink changes with doping, but the energy scale remains the same. These results provide the first non-cuprate platform for exploring the relationship between the pseudogap, d-wave instability and electron-boson coupling in doped Mott insulators.

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Presenters

  • Junfeng He

    • University of Science and Technology of China

Authors

  • Yong Hu

    • University of Science and Technology of China

  • Xiang Chen

    • University of California, Santa Barbara

  • Shuting Peng

    • University of Science and Technology of China

  • Christopher Lane

    • Northeastern University
    • Physics, Northeastern University
    • Los Alamos National Laboratory

  • Matthew Matzelle

    • Northeastern University

  • Zeliang Sun

    • University of Science and Technology of China

  • Makoto Hashimoto

    • SLAC National Accelerator Laboratory, Stanford Synchrotron Radiation Lightsource
    • Stanford Synchrotron Radiation Lightsource
    • SSRL, SLAC National Laboratory
    • SLAC National Accelerator Laboratory
    • Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory

  • Donghui Lu

    • SLAC National Accelerator Laboratory, Stanford Synchrotron Radiation Lightsource
    • Stanford Synchrotron Radiation Lightsource
    • SLAC National Accelerator Laboratory
    • SLAC - Natl Accelerator Lab
    • Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory

  • Eike F. Schwier

    • Hiroshima University
    • Hiroshima Synchrotron Radiation Center, Hiroshima University

  • Masashi Arita

    • Hiroshima University
    • Hiroshima Synchrotron Radiation Center, Hiroshima University

  • Tao Wu

    • University of Science and Technology of China

  • Robert Markiewicz

    • Northeastern University

  • Kenya Shimada

    • Hiroshima University
    • Hiroshima Synchrotron Radiation Center, Hiroshima University

  • Xianhui Chen

    • University of Science and Technology of China
    • Nanjing University
    • physics department, University of Science and Technology of China

  • Zhixun Shen

    • Standford
    • Stanford University
    • Stanford Univeristy
    • Applied Physics, Stanford University
    • SLAC National Accelerator Laboratory
    • Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory
    • SIMES, SLAC - Natl Accelerator Lab
    • Stanford Univ

  • Arun Bansil

    • Northeastern University
    • Physics, Northeastern University

  • Stephen Wilson

    • University of California, Santa Barbara
    • Materials Department, University of California, Santa Barbara
    • Materials Engineering, University of California, Santa Barbara
    • California NanoSystems Institute/Materials, University of California, Santa Barbara

  • Junfeng He

    • University of Science and Technology of China