Fragility of the magnetic order in the prototypical altermagnet RuO$_2$
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2023
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| _version_ | 1866909186920546304 |
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| author | Smolyanyuk, Andriy Mazin, Igor I. Garcia-Gassull, Laura Valentí, Roser |
| author_facet | Smolyanyuk, Andriy Mazin, Igor I. Garcia-Gassull, Laura Valentí, Roser |
| contents | Altermagnetism is a topic that has lately been gaining attention and the RuO$_2$ compound is among one of the most studied altermagnetic candidates. However, the survey of available literature on RuO$_2$ properties suggests that there is no consensus about the magnetism of this material. By performing density functional theory calculations, we show that the electronic properties of stoichiometric RuO$_2$ are described in terms of a smaller Hubbard $U$ within DFT+$U$ than the value required to have magnetism. We further argue that Ru vacancies can actually aid the formation of a magnetic state in RuO$_2$. This in turn suggests that a characterization of the amount of Ru vacancies in experimental samples might help the resolution of the controversy between the different experimental results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_06909 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Fragility of the magnetic order in the prototypical altermagnet RuO$_2$ Smolyanyuk, Andriy Mazin, Igor I. Garcia-Gassull, Laura Valentí, Roser Materials Science Altermagnetism is a topic that has lately been gaining attention and the RuO$_2$ compound is among one of the most studied altermagnetic candidates. However, the survey of available literature on RuO$_2$ properties suggests that there is no consensus about the magnetism of this material. By performing density functional theory calculations, we show that the electronic properties of stoichiometric RuO$_2$ are described in terms of a smaller Hubbard $U$ within DFT+$U$ than the value required to have magnetism. We further argue that Ru vacancies can actually aid the formation of a magnetic state in RuO$_2$. This in turn suggests that a characterization of the amount of Ru vacancies in experimental samples might help the resolution of the controversy between the different experimental results. |
| title | Fragility of the magnetic order in the prototypical altermagnet RuO$_2$ |
| topic | Materials Science |
| url | https://arxiv.org/abs/2310.06909 |