Search for Q ~ 0 Order near a Forbidden Bragg Position in Bi<sub>2.1</sub>Sr<sub>1.9</sub>CaCu<sub>2</sub>O<sub>8+x</sub> with Resonant Soft X-ray Scattering

ORAL

Abstract

Identifying what broken symmetries are present in the cuprates has become a major area of research. Many authors have reported evidence for the so-called “Q ~ 0” order that involves broken inversion, mirror, chiral, or time-reversal symmetry that is uniform in space. Here we use resonant soft x-ray scattering to search for Q ~ 0 order in Bi2.1Sr1.9CaCu2O8+x by measuring the region of a forbidden Bragg peak, (0, 0, 3), which is normally extinguished by symmetry but may become allowed on resonance if valence band order is present. Using circularly polarized light, we found that this reflection becomes allowed on the Cu L3 resonance for temperatures Tc < T < T*, though remains absent in linear polarization and at other temperatures. This observation suggests the existence of spatially uniform valence band order near the pseudogap temperature.

*RSXS experiments were supported by DOE grant No. DE-FG02-06ER46285. P.A. acknowledges Gordon and Betty Moore Foundation EPiQS grant no. GBMF9452.

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Publication: Xuefei Guo, Sangjun Lee, Thomas A. Johnson, Jin Chen, Paul Vandeventer, Ali A. Husain, Fanny Rodolakis, Jessica L. McChesney, Padraic Shafer, Hai Huang, Jun-Sik Lee, John Schneeloch, Ruidan Zhong, Genda Gu, Matteo Mitrano, and Peter Abbamonte, J. Phys. Soc. Jpn. 90, 111007 (2021)

Presenters

  • Xuefei Guo

    • University of Illinois at Urbana-Champaign
    • University of Illinois at Urbana-Champai

Authors

  • Xuefei Guo

    • University of Illinois at Urbana-Champaign
    • University of Illinois at Urbana-Champai

  • Sangjun Lee

    • Samsung Advanced Institute of Technology
    • University of Illinois at Urbana-Champaign

  • Thomas A Johnson

    • University of Illinois at Urbana-Champaign
    • University of Illinois

  • Jin Chen

    • University of Illinois at Urbana-Champaign
    • University of Illinois at Urbana-Champai

  • Paul Vandeventer

    • Department of Physics and Materials Research Laboratory

  • Ali A Husain

    • University of Illinois at Urbana-Champaign

  • Fanny Rodolakis

    • Advanced Photon Source, Argonne National Laboratory
    • Argonne National Laboratory

  • Jessica L McChesney

    • Argonne National Laboratory

  • Padraic Shafer

    • Advanced Light Source
    • Lawrence Berkeley National Laboratory
    • Advanced Light Source, Lawrence Berkeley National Lab
    • Advanced Light Source, Lawrence Berkeley National Laboratory

  • Hai Huang

    • SSRL,SLAC National Accelerator Laboratory
    • SLAC - Natl Accelerator Lab

  • Jun-Sik Lee

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

  • J Schneeloch

    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USA
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory

  • Ruidan Zhong

    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USA
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory

  • Genda Gu

    • Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USA

  • Matteo Mitrano

    • Harvard University

  • Peter Abbamonte

    • University of Illinois at Urbana-Champai
    • University of Illinois at Urbana-Champaign
    • University of Illinois