Constraints on magnetism and correlations in RuO${}_2$ from lattice dynamics and Mössbauer spectroscopy

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 ${}^{99}$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.

References in corpus (6)

• Itinerant Antiferromagnetism in RuO${}_2$
• Nonmagnetic Ground State in RuO${}_2$ Revealed by Muon Spin Rotation
• Absence of altermagnetic spin splitting character in rutile oxide RuO${}_2$
• Density Functional Methods for the Magnetism of Transition Metals: SCAN in Relation to Other Functionals
• Fermi-liquid behavior of non-altermagnetic RuO${}_2$
• Crystal structure and absence of magnetic order in single crystalline RuO${}_2$

Cited by in corpus (2)

• Observation of mirror-odd and mirror-even spin texture in ultrathin epitaxially strained RuO2 films
• T-square electric resistivity and its thermal counterpart in RuO${}_2$