Adding depth resolution to resonant inelastic X-ray scattering by means of standing-wave excitation

ORAL

Abstract

Resonant inelastic X-ray scattering (RIXS) is a photon-in/photon-out synchrotron-based spectroscopy that uniquely probes the charge transfer, dd, magnetic, phonon and other excitations in correlated oxides and other systems.RIXS is considered to be a probe of bulk properties, reaching depths of the order of 1000 Å. It is thus desirable to give RIXS more quantitative depth resolution, for example to investigate interfaces in oxide heterostructures, which are known to show emergent properties (e.g. interface-induced ferromagnetism at the La1.85Sr0.15CuO4/La0.67Sr0.33MnO3 (LSCO/LSMO) heterostructures, 2D electron gases at LaAlO3/SrTiO3 (LAO/STO) heterostructure) not present in the single constituents. Here, we demonstrate that, by using standing-wave (SW) excitation from multilayer heterostructures, interface-specific RIXS information can be obtained. We present the results of SW-RIXS measurements on LSCO/LSMO and LAO/STO superlattices. SW effects are clearly observed on the RIXS excitations for these systems and were found to have different depth distribution. SW-RIXS will open up a new spatial dimension to this already powerful technique.

*This work was supported by the US Department of Energy under Contract No. DE-SC0014697 through the University of California Davis.

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Presenters

  • Cheng-Tai Kuo

    • Department of Physics, University of California, Davis

Authors

  • Cheng-Tai Kuo

    • Department of Physics, University of California, Davis

  • Shih-Chieh Lin

    • Department of Physics, University of California, Davis

  • Yingying Peng

    • Department of Physics and Seitz Materials Research Laboratory, University of Illinois, Urbana

  • Yu-Cheng Shao

    • Advanced Light Source, Lawrence Berkeley National Laboratory

  • Gabriella Maria De Luca

    • CNR-SPIN

  • Daniele Di Castro

    • CNR-SPIN

  • Ismael Graff

    • Departamento de Fisica, Universidade Federal do Parana

  • Nicholas B Brookes

    • European Synchrotron Radiation Facility

  • Yi-De Chuang

    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Natron Energy

  • Mark Huijben

    • University of Twente

  • Lucio Braicovich

    • Politecnico di Milano

  • Giacomo Ghiringhelli

    • Politecnico di Milano
    • Dipartimento di Fisica, Politecnico di Milano

  • Charles Fadley

    • Department of Physics, University of California, Davis