Polarization dependence of charge-transfer excitations in La$_2$CuO$_4$

ORAL

Abstract

We have carried out an extensive resonant inelastic x-ray scattering (RIXS) study of La$_2$CuO$_4$ at the Cu K-edge. Multiple charge-transfer excitations have been identified using the incident photon energy dependence of the cross section and studied carefully with polarizations E//c and E //ab. An analysis of the incident photon energy dependence, the polarization dependence, as well as the K-edge absorption spectra, indicates that the RIXS spectra reveal rich physics about the K-edge absorption process and momentum-dependent charge-transfer excitations in cuprates.

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Authors

  • Li Lu

    • Applied Physics Department, Stanford University

  • Guillaume Chabot-Couture

    • Applied Physics Department, Stanford University
    • Department of Applied Physics, Stanford University, Stanford, California 94305

  • Jason Hancock

    • Stanford Synchroton Radiation Laboratory, Stanford University
    • Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94309

  • Owen Vajk

    • National Institute of Standards and Technology

  • Guichuan Yu

    • Department of Physics, Stanford University, Stanford, California 94305
    • Stanford University

  • Kenji Ishii

    • SPring-8, Japan Atomic Energy Agency

  • Jun'ichiro Mizuki

    • Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute, Hyogo 679-5148, Japan

  • D. Casa

    • CMC-CAT, Advanced Photon Source, Argonne National Laboratory

  • T. Gog

    • CMC-CAT, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439
    • CMC-CAT, Advanced Photon Source, Argonne National Laboratory
    • Argonne National Laboratory

  • Martin Greven

    • Stanford University
    • Department of Applied Physics, Stanford University, Stanford, California 94305