Constraints on magnetism and correlations in RuO$_2$ from lattice dynamics and Mössbauer spectroscopy
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2025
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| author | 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. |
| author_facet | 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. |
| 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_03250 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Constraints on magnetism and correlations in RuO$_2$ from lattice dynamics and Mössbauer spectroscopy 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. Materials Science Other Condensed Matter 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. |
| title | Constraints on magnetism and correlations in RuO$_2$ from lattice dynamics and Mössbauer spectroscopy |
| topic | Materials Science Other Condensed Matter |
| url | https://arxiv.org/abs/2505.03250 |