Absence of altermagnetic spin splitting character in rutile oxide RuO$_2$
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909380213997568 |
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| author | Liu, Jiayu Zhan, Jie Li, Tongrui Liu, Jishan Cheng, Shufan Shi, Yuming Deng, Liwei Zhang, Meng Li, Chihao Ding, Jianyang Jiang, Qi Ye, Mao Liu, Zhengtai Jiang, Zhicheng Wang, Siyu Li, Qian Xie, Yanwu Wang, Yilin Qiao, Shan Wen, Jinsheng Sun, Yan Shen, Dawei |
| author_facet | Liu, Jiayu Zhan, Jie Li, Tongrui Liu, Jishan Cheng, Shufan Shi, Yuming Deng, Liwei Zhang, Meng Li, Chihao Ding, Jianyang Jiang, Qi Ye, Mao Liu, Zhengtai Jiang, Zhicheng Wang, Siyu Li, Qian Xie, Yanwu Wang, Yilin Qiao, Shan Wen, Jinsheng Sun, Yan Shen, Dawei |
| contents | Rutile RuO$_2$ has been posited as a potential $d$-wave altermagnetism candidate, with a predicted significant spin splitting up to 1.4 eV. Despite accumulating theoretical predictions and transport measurements, direct spectroscopic observation of spin splitting has remained elusive. Here, we employ spin- and angle-resolved photoemission spectroscopy to investigate the band structures and spin polarization of thin-film and single-crystal RuO$_2$. Contrary to expectations of altermagnetism, our analysis indicates that RuO$_2$'s electronic structure aligns with those predicted under non-magnetic conditions, exhibiting no evidence of the hypothesized spin splitting. Additionally, we observe significant in-plane spin polarization of the low-lying bulk bands, which is antisymmetric about the high-symmetry plane and contrary to the $d$-wave spin texture due to time-reversal symmetry breaking in altermagnetism. These findings definitively challenge the altermagnetic order previously proposed for rutile RuO$_2$, prompting a reevaluation of its magnetic properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_13504 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Absence of altermagnetic spin splitting character in rutile oxide RuO$_2$ Liu, Jiayu Zhan, Jie Li, Tongrui Liu, Jishan Cheng, Shufan Shi, Yuming Deng, Liwei Zhang, Meng Li, Chihao Ding, Jianyang Jiang, Qi Ye, Mao Liu, Zhengtai Jiang, Zhicheng Wang, Siyu Li, Qian Xie, Yanwu Wang, Yilin Qiao, Shan Wen, Jinsheng Sun, Yan Shen, Dawei Materials Science Rutile RuO$_2$ has been posited as a potential $d$-wave altermagnetism candidate, with a predicted significant spin splitting up to 1.4 eV. Despite accumulating theoretical predictions and transport measurements, direct spectroscopic observation of spin splitting has remained elusive. Here, we employ spin- and angle-resolved photoemission spectroscopy to investigate the band structures and spin polarization of thin-film and single-crystal RuO$_2$. Contrary to expectations of altermagnetism, our analysis indicates that RuO$_2$'s electronic structure aligns with those predicted under non-magnetic conditions, exhibiting no evidence of the hypothesized spin splitting. Additionally, we observe significant in-plane spin polarization of the low-lying bulk bands, which is antisymmetric about the high-symmetry plane and contrary to the $d$-wave spin texture due to time-reversal symmetry breaking in altermagnetism. These findings definitively challenge the altermagnetic order previously proposed for rutile RuO$_2$, prompting a reevaluation of its magnetic properties. |
| title | Absence of altermagnetic spin splitting character in rutile oxide RuO$_2$ |
| topic | Materials Science |
| url | https://arxiv.org/abs/2409.13504 |