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| Autori principali: | , , , , , , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2025
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| Accesso online: | https://arxiv.org/abs/2509.16361 |
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| _version_ | 1866911556924604416 |
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| author | Zhang, Yichen Jeong, Seung Gyo Buiarelli, Luca Lee, Seungjun Guo, Yucheng Wen, Jiaqin Li, Hang Nair, Sreejith Choi, In Hyeok Ren, Zheng Yue, Ziqin Fedorov, Alexei Mo, Sung-Kwan Kono, Junichiro Lee, Jong Seok Low, Tony Birol, Turan Fernandes, Rafael M. Radovic, Milan Jalan, Bharat Yi, Ming |
| author_facet | Zhang, Yichen Jeong, Seung Gyo Buiarelli, Luca Lee, Seungjun Guo, Yucheng Wen, Jiaqin Li, Hang Nair, Sreejith Choi, In Hyeok Ren, Zheng Yue, Ziqin Fedorov, Alexei Mo, Sung-Kwan Kono, Junichiro Lee, Jong Seok Low, Tony Birol, Turan Fernandes, Rafael M. Radovic, Milan Jalan, Bharat Yi, Ming |
| contents | Recently, rutile RuO$_2$ has attracted renewed interest due to expectations of prominent altermagnetic spin-splitting. However, accumulating experimental evidence suggests that in its bulk and thick-film forms, RuO$_2$ does not display any form of magnetic ordering. Despite this, the spin structure of RuO$_2$ remains largely unexplored in the ultra-thin limit, where substrate-imposed epitaxial strain can be substantial. Here, we employ spin-resolved angle-resolved photoemission spectroscopy, supported by ab-initio calculations, to reveal the electronic structure of 2.7~nm-thick epitaxial RuO$_2$ heterostructures. We observe an unconventional spin texture characterized by the coexistence of mirror-even and mirror-odd momentum-dependent components. A comprehensive symmetry analysis rules out nonmagnetic origins of this spin texture. These findings suggest an emergent non-relativistic spin structure enabled by epitaxial strain in the ultra-thin limit, marking a distinct departure from the behavior of relaxed or bulk RuO$_2$. Our work opens new perspectives for exploring symmetry-breaking mechanisms and spin textures in oxide heterostructures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_16361 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Observation of mirror-odd and mirror-even spin texture in ultra-thin epitaxially-strained RuO2 films Zhang, Yichen Jeong, Seung Gyo Buiarelli, Luca Lee, Seungjun Guo, Yucheng Wen, Jiaqin Li, Hang Nair, Sreejith Choi, In Hyeok Ren, Zheng Yue, Ziqin Fedorov, Alexei Mo, Sung-Kwan Kono, Junichiro Lee, Jong Seok Low, Tony Birol, Turan Fernandes, Rafael M. Radovic, Milan Jalan, Bharat Yi, Ming Materials Science Strongly Correlated Electrons Recently, rutile RuO$_2$ has attracted renewed interest due to expectations of prominent altermagnetic spin-splitting. However, accumulating experimental evidence suggests that in its bulk and thick-film forms, RuO$_2$ does not display any form of magnetic ordering. Despite this, the spin structure of RuO$_2$ remains largely unexplored in the ultra-thin limit, where substrate-imposed epitaxial strain can be substantial. Here, we employ spin-resolved angle-resolved photoemission spectroscopy, supported by ab-initio calculations, to reveal the electronic structure of 2.7~nm-thick epitaxial RuO$_2$ heterostructures. We observe an unconventional spin texture characterized by the coexistence of mirror-even and mirror-odd momentum-dependent components. A comprehensive symmetry analysis rules out nonmagnetic origins of this spin texture. These findings suggest an emergent non-relativistic spin structure enabled by epitaxial strain in the ultra-thin limit, marking a distinct departure from the behavior of relaxed or bulk RuO$_2$. Our work opens new perspectives for exploring symmetry-breaking mechanisms and spin textures in oxide heterostructures. |
| title | Observation of mirror-odd and mirror-even spin texture in ultra-thin epitaxially-strained RuO2 films |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.16361 |