\textbf{Resonant inelastic x-ray scattering study at the oxygen K-edge of corner-shared Sr}$_{\mathbf{2}}$\textbf{CuO}$_{\mathbf{3}}$\textbf{ cuprate}

ORAL

Abstract

We present a resonant inelastic x-ray scattering (RIXS) study at the oxygen K-edge of the spin-chain system Sr$_{2}$CuO$_{3}$. We investigate this system using small cluster exact diagonalization calculations for a microscopic model that considers all the orbitals of Cu and O in CuO3-unit cell. Using a canonical parameter set, we compute the XAS and RIXS spectra in comparison to the experiment. This allows us to identify the \textit{dd}- and charge transfer excitations in the observed spectrum. We also infer the presence of several low energy excitations that may be related to phononic and/or magnetic excitations.

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Authors

  • Umesh Kumar

    • Department of Physics and Astronomy, University of Tennessee, Knoxville, USA

  • Justine Schlappa

    • European XRay FreeElectron Laser Facility GmbH, Hamburg, Germany

  • Kejin Zhou

    • Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire

  • Surjeet Singh

    • Indian Institute of Science Education and Research, Pashan, Pune, India

  • Vladimir Strocov

    • Swiss Light Source, Paul Scherrer Institut, Villigen, Switzerland

  • Alexandre Revcolevschi

    • Université Paris-Sud, Orsay Cedex, France

  • H.M. Ronnow

    • Ecole Polytechnique Federale de Lausanne (EPFL)
    • Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, Switzerland
    • EPFL, Switzerland

  • Steven Johnston

    • University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee, Knoxville, USA
    • Department of Physics and Astronomy, The University of Tennessee, Knoxville
    • Univ of Tennessee, Knoxville

  • Thorsten Schmitt

    • Swiss Light Source, PSI
    • Swiss Light Source, Paul Scherrer Institut, Villigen, Switzerland
    • SLS PSI Villigen Switzerland
    • Paul Scherrer Institute, Switzerland