Doping-dependent phonon anomaly and charge order in Hg-family of high-<i>T</i><sub>c</sub> cuprates

ORAL

Abstract

Charge order is ubiquitously found in high-Tc cuprate superconductors, yet their microscopic origin has been elusive. The Hg-family of cuprates are known for their high Tc and relatively simple structure, and are therefore promising systems for avoiding material-specific complexity in experimental studies. Using resonant X-ray diffraction and Raman spectroscopy to study high-quality single crystals [1,2] of the first two members of the family, Hg1201 and Hg1212, we establish universal existence of charge order in these compounds . The most robust charge order is found in underdoped samples near a hole-carrier concentration of 0.09. Interestingly, we observe concomitant anomalies in the lattice dynamics that involve the motion of atoms in and/or adjacent to the CuO2 layers, around the same doping in both materials. As these anomalies are already present at room temperature, before the formation of charge order, we attribute them to a doping-dependent instability of the CuO2 layers that drives the formation of charge order as an emergent phenomenon [3].

[1] Barisic et al., PRB 78, 054518 (2008).
[2] Wang et al., PRM 2, 123401 (2018).
[3] Wang et al., arXiv:1910.08254.

*Work at PKU and UMN is supported by NSFC and MOST of China and by DoE of the US, respectively.

Presenters

  • Yuan Li

    • International Center for Quantum Materials, Peking University
    • International Center for Quantum Materials, School of Physics, Peking University
    • Peking University, China
    • Peking University
    • Peking Univ

Authors

  • Lichen Wang

    • Solid State Spectroscopy, Max Planck Institute for Solid State Research
    • Peking University, China

  • Biqiong Yu

    • School of Physics and Astronomy, University of Minnesota
    • University of Minnesota

  • Ran Jing

    • Columbia University, The Department of Physics
    • Columbia University
    • Peking University, China
    • Physics, Columbia University

  • Xiangpeng Luo

    • Peking University, China
    • Univ of Michigan - Ann Arbor

  • Junbang Zeng

    • Peking University, China

  • Jiarui Li

    • Massachusetts Institute of Technology MIT
    • Peking University, China

  • Izabela Bialo

    • AGH University of Science and Technology, Poland

  • Martin Bluschke

    • Max Planck Institute for Solid State Research, Germany

  • Yang Tang

    • University of Minnesota
    • Physics and Astronomy, University of Minnesota

  • Jacob Freyermuth

    • University of Minnesota

  • Guichuan Yu

    • University of Minnesota

  • Ronny Sutarto

    • Canadian Light Source
    • Canadian Lightsource

  • Feizhou He

    • Canadian Light Source
    • Canadian Lightsource

  • Eugen Weschke

    • HZB, Germany

  • Wojciech Tabis

    • University of Minnesota
    • LNCMI Toulouse
    • Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Krakow, Poland

  • Martin Greven

    • School of Physics and Astronomy, University of Minnesota
    • University of Minnesota
    • Physics and Astronomy, University of Minnesota
    • School of Physics and Astronomy, University of Minnesota Twin Cities

  • Yuan Li

    • International Center for Quantum Materials, Peking University
    • International Center for Quantum Materials, School of Physics, Peking University
    • Peking University, China
    • Peking University
    • Peking Univ