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

Cheng Tai Kuo*, Shih Chieh Lin, Giacomo Ghiringhelli, Yingying Peng, Gabriella Maria De Luca, Daniele Di Castro, Davide Betto, Mathias Gehlmann, Tom Wijnands, Mark Huijben, Julia Meyer-Ilse, Eric Gullikson, Jeffrey B. Kortright, Arturas Vailionis, Nicolas Gauquelin, Johan Verbeeck, Timm Gerber, Giuseppe Balestrino, Nicholas B. Brookes, Lucio BraicovichCharles S. Fadley

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number235146
JournalPhysical Review B
Volume98
Issue number23
DOIs
Publication statusPublished - 21 Dec 2018

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