Journal Article

PUBDB-2025-04018

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Constraints on magnetism and correlations in RuO$_2$ from lattice dynamics and Mössbauer spectroscopy

Yumnam, G. (Corresponding author) ; Raghuvanshi, P. R. ; Budai, J. D. ; Bocklage, L.XFEL.EU*DESY* ; Abernathy, D. ; Cheng, Y. ; Said, A.Extern* ; Mazin, I. I. ; Zhou, H. ; Frandsen, B. A. ; Parker, D. S. ; Lindsay, L. R. ; Cooper, V. R. ; Manley, M. E. ; Hermann, R. (Corresponding author)Extern*

2025
Cell Press Maryland Heights, MO

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Please use a persistent id in citations: doi:10.1016/j.xcrp.2025.102852  doi:10.3204/PUBDB-2025-04018

Abstract: We provide experimental evidence for the absence of a magnetic moment in bulk RuO$_2$, a candidate altermagnetic material, by using a combination of Mössbauer spectroscopy, nuclear forward scattering, inelastic X-ray and neutron scattering, and density functional theory calculations. Using complementary Mössbauer and nuclear forward scattering, we determine the Ru magnetic hyperfine splitting to be negligible. Inelastic X-ray and neutron scattering-derived lattice dynamics of RuO$_2$ are compared to density functional theory calculations of varying flavors. Comparisons among theory with experiments indicate that electronic correlations, rather than magnetic order, are key in describing the lattice dynamics.

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Contributing Institute(s):

1. FS-Photon Science (FS-PS)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. AIM, DFG project G:(GEPRIS)390715994 - EXC 2056: CUI: Advanced Imaging of Matter (390715994) (390715994)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2025

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