\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