Preliminary Inelastic Neutron Scattering Results for the Magnetic Excitations in the Model Superconductor HgBa$_{2}$CuO$_{4+\delta }$

ORAL

Abstract

HgBa$_{2}$CuO$_{4+\delta }$ has a simple crystal structure and possess the highest T$_{c}$ (97 K at optimal doping) among all the single-layer cuprates. In a significant breakthrough, we were able to grow large HgBa$_{2}$CuO$_{4+\delta }$ single crystals, enabling us to perform the first inelastic magnetic neutron scattering experiments on this model superconductor. We performed energy scans at ($\pi $,$\pi )$ and momentum scans at fixed energy at 10 K and above Tc. Our preliminary results include the observation of a 52 meV feature at ($\pi $, $\pi )$ that resembles the ``resonance'' found in other cuprates.

*The authors gratefully acknowledge support from NSF and DOE.

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Authors

  • G. Yu

  • X. Zhao

  • Y. C. Cho

  • G. Chabot-Couture

  • E. M. Motoyama

    • Department of Applied Physics, Physics, and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, USA

  • P. Bourges

    • Laboratoire Leon Brillouin, CEA-Saclay, 91191 Gif-sur-Yvette, Cedex, France

  • M. Greven

    • Department of Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, USA