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Main Authors: Yumnam, George, Raghuvanshi, Parul R., Budai, John D., Bansal, Dipanshu, Bocklage, Lars, Abernathy, Douglas, Cheng, Yongqiang, Said, Ayman, Mazin, Igor I., Zhou, Haidong, Frandsen, Benjamin A., Parker, David S., Lindsay, Lucas R., Cooper, Valentino R., Manley, Michael E., Hermann, Raphaël P.
Format: Preprint
Published: 2025
Subjects:
Materials Science
Other Condensed Matter
Online Access:https://arxiv.org/abs/2505.03250
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Table of Contents:
  • 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 $^{99}$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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