Magnetic Excitations in Highly Underdoped Superconducting HgBa<sub>2</sub>CuO<sub>4+δ</sub>

ORAL

Abstract

Antiferromagnetic (AF) spin correlations are prominent across the phase diagram of the cuprate superconductors, and it has been proposed that they mediate Cooper pairing and are responsible for various pseudogap phenomena. HgBa2CuO4+δ (Hg1201) is a simple-tetragonal compound with a single CuO2 plane per unit cell and the highest optimal Tc among single-layer cuprates, and thus a model system for the study of the AF response of the quintessential CuO2 planes. Our previous work has shown that the AF excitations in moderately to optimally-doped Hg1201 are distinctly different from what had been observed in other cuprates; namely, the low-energy response is commensurate and gapped, resulting in a 'Y'-shaped, rather than 'X'-shaped dispersion. Here we present our recent inelastic neutron scattering measurements of the AF excitations in heavily underdoped Hg1201.

*The work at the University of Minnesota was funded by the Department of Energy through the University of Minnesota Center for Quantum Materials under DE-SC-0016371.

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Presenters

  • Zachary Anderson

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

Authors

  • Zachary Anderson

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

  • Yang Tang

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

  • Vikram Nagarajan

    • Physics, University of California, Berkeley
    • University of California, Berkeley
    • Department of Physics, University of California, Berkeley

  • Mun Chan

    • Los Alamos National Laboratory
    • Los Alamos National Labs

  • Chelsey J Dorow

    • University of California, San Diego

  • Guichuan Yu

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

  • Douglas L Abernathy

    • Spallation Neutron Source, Oak Ridge National Laboratory
    • Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475, USA

  • Andrew D Christianson

    • Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Materials Science and Technology Division, Oak-Ridge National Laboratory
    • Materials Science and Technology Division, Oak Ridge National Lab
    • Oak Ridge National Laboratory

  • Lucile Mangin-Thro

    • Institut Laue-Langevin

  • Paul Steffens

    • Insitut Laue-Langevin
    • Institut Laue-Langevin

  • Yvan Sidis

    • Laboratoire Léon Brillouin, CEA-CNRS

  • Philippe Bourges

    • Laboratoire Léon Brillouin, CEA-CNRS

  • Martin Greven

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