Strain analysis from M-edge resonant inelastic X-ray scattering of nickel oxide films

Miedema, Piter S.; Thielemann-Kühn, N.; Calafell, Irati Alonso; Schüßler-Langeheine, C.; Beye, Martin

doi:10.1039/c9cp03593a

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…This is required to describe the interaction of the valence electrons with the core-hole created after the absorption step in the RIXS process. The 3p core-hole at the Medges is shallower than the 2p core-hole of the L-edges, which modulates the interaction of this p core-hole with the valence 4d electrons [36][37][38] . The intra-atomic electron interactions amongst the valence electrons ('dd' correlations) and the intermediate state interaction of the valence d electrons with the core p-shell ('pd' correlations), are introduced through the direct (Slater) and exchange Coulomb interaction integrals (see Appendix B).…”

Section: Modelingmentioning

confidence: 99%

“…On this front, resonant inelastic x-ray scattering (RIXS) is an ideal tool for investigating d-orbital levels including relative SOC and orbital energetics [30][31][32][33] . While significant progress has been made in the study of 4d oxides using L-edge RIXS (in the tender x-ray regime) 34,35 , M 2,3 -edge (3p → 3d/4d) RIXS (in the soft x-ray regime) is in many ways analogous to the former [36][37][38] and offers an alternative for investigating 4d physics 39 .…”

Section: Introductionmentioning

confidence: 99%

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Local electronic structure of rutile RuO$_2$

Occhialini¹,

Bisogni²,

You³

et al. 2021

Preprint

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Recently, rutile RuO2 has raised interest for its itinerant antiferromagnetism, crystal Hall effect, and strain-induced superconductivity. Understanding and manipulating these properties demands resolving the electronic structure and the relative roles of the rutile crystal field and 4d spin-orbit coupling (SOC). Here, we use O-K and Ru M3 x-ray absorption (XAS) and Ru M3 resonant inelastic x-ray scattering (RIXS) to disentangle the contributions of crystal field, SOC, and electronic correlations in RuO2. The locally orthorhombic site symmetry of the Ru ions introduces significant crystal field contributions beyond the approximate octahedral coordination yielding a crystal field energy scale of ∆(t2g) ≈ 1 eV breaking the degeneracy of the t2g orbitals. This splitting exceeds the Ru SOC (≈ 160 meV) suggesting a more subtle role of SOC, primarily through the modification of itinerant (rather than local) 4d electronic states, ultimately highlighting the importance of the local symmetry in RuO2. Remarkably, our analysis can be extended to other members of the rutile family, thus advancing the comprehension of the interplay among crystal field symmetry, electron correlations, and SOC in transition metal compounds with the rutile structure.

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Section: Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Local electronic structure of rutile RuO$_2$

Occhialini¹,

Bisogni²,

You³

et al. 2021

Preprint

View full text Add to dashboard Cite

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Ultrafast demagnetization in bulk nickel induced by X-ray photons tuned to Ni M3 and L3 absorption edges

Kapcia,

Tkachenko,

Capotondi

et al. 2024

Sci Rep

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Studies of light-induced demagnetization started with the experiment performed by Beaupaire et al. on Ni. Here, we present theoretical predictions for X-ray induced demagnetization of nickel, with X-ray photon energies tuned to its $$M_3$$ M 3 and $$L_3$$ L 3 absorption edges. We show that the specific feature in the density of states in the d-band of Ni, i.e., a sharp peak located just above the Fermi level, strongly influences the change of the predicted magnetic signal, making it stronger than in the previously studied case of X-ray demagnetized cobalt. It impacts also the value of Curie temperature for Ni. We believe that this finding will inspire dedicated experiments investigating magnetic processes in X-ray irradiated nickel and cobalt.

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