Magnetic Excitations in Highly Underdoped Superconducting HgBa2CuO4+δ

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.

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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