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Depth-resolved resonant inelastic x-ray scattering at a superconductor/half-metallic-ferromagnet interface through standing wave excitation

  • Author(s): Kuo, Cheng-Tai
  • Lin, Shih-Chieh
  • Ghiringhelli, Giacomo
  • Peng, Yingying
  • De Luca, Gabriella Maria
  • Di Castro, Daniele
  • Betto, Davide
  • Gehlmann, Mathias
  • Wijnands, Tom
  • Huijben, Mark
  • Meyer-Ilse, Julia
  • Gullikson, Eric
  • Kortright, Jeffrey B
  • Vailionis, Arturas
  • Gauquelin, Nicolas
  • Verbeeck, Johan
  • Gerber, Timm
  • Balestrino, Giuseppe
  • Brookes, Nicholas B
  • Braicovich, Lucio
  • Fadley, Charles S
  • et al.
Abstract

© 2018 American Physical Society. We demonstrate that combining standing wave (SW) excitation with resonant inelastic x-ray scattering (RIXS) can lead to depth resolution and interface sensitivity for studying orbital and magnetic excitations in correlated oxide heterostructures. SW-RIXS has been applied to multilayer heterostructures consisting of a superconductor La1.85Sr0.15CuO4 (LSCO) and a half-metallic ferromagnet La0.67Sr0.33MnO3 (LSMO). Easily observable SW effects on the RIXS excitations were found in these LSCO/LSMO multilayers. In addition, we observe different depth distribution of the RIXS excitations. The magnetic excitations are found to arise from the LSCO/LSMO interfaces, and there is also a suggestion that one of the dd excitations comes from the interfaces. SW-RIXS measurements of correlated-oxide and other multilayer heterostructures should provide unique layer-resolved insights concerning their orbital and magnetic excitations, as well as a challenge for RIXS theory to specifically deal with interface effects.

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