Observation of plaid-like spin splitting in a noncoplanar antiferromagnet
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| author | Zhu, Yu-Peng Chen, Xiaobing Liu, Xiang-Rui Liu, Yuntian Liu, Pengfei Zha, Heming Qu, Gexing Hong, Caiyun Li, Jiayu Jiang, Zhicheng Ma, Xiao-Ming Hao, Yu-Jie Zhu, Ming-Yuan Liu, Wenjing Zeng, Meng Jayaram, Sreehari Lenger, Malik Ding, Jianyang Mo, Shu Tanaka, Kiyohisa Arita, Masashi Liu, Zhengtai Ye, Mao Shen, Dawei Wrachtrup, Jörg Huang, Yaobo He, Rui-Hua Qiao, Shan Liu, Qihang Liu, Chang |
| author_facet | Zhu, Yu-Peng Chen, Xiaobing Liu, Xiang-Rui Liu, Yuntian Liu, Pengfei Zha, Heming Qu, Gexing Hong, Caiyun Li, Jiayu Jiang, Zhicheng Ma, Xiao-Ming Hao, Yu-Jie Zhu, Ming-Yuan Liu, Wenjing Zeng, Meng Jayaram, Sreehari Lenger, Malik Ding, Jianyang Mo, Shu Tanaka, Kiyohisa Arita, Masashi Liu, Zhengtai Ye, Mao Shen, Dawei Wrachtrup, Jörg Huang, Yaobo He, Rui-Hua Qiao, Shan Liu, Qihang Liu, Chang |
| contents | Spatial, momentum and energy separation of electronic spins in condensed matter systems guides the development of novel devices where spin-polarized current is generated and manipulated. Recent attention on a set of previously overlooked symmetry operations in magnetic materials leads to the emergence of a new type of spin splitting, enabling giant and momentum-dependent spin polarization of energy bands on selected antiferromagnets. Despite the ever-growing theoretical predictions, the direct spectroscopic proof of such spin splitting is still lacking. Here, we provide solid spectroscopic and computational evidence for the existence of such materials. In the noncoplanar antiferromagnet MnTe$_2$, the in-plane components of spin are found to be antisymmetric about the high-symmetry planes of the Brillouin zone, comprising a plaid-like spin texture in the antiferromagnetic (AFM) ground state. Such an unconventional spin pattern, further found to diminish at the high-temperature paramagnetic state, stems from the intrinsic AFM order instead of spin-orbit coupling (SOC). Our finding demonstrates a new type of quadratic spin texture induced by time-reversal breaking, placing AFM spintronics on a firm basis and paving the way for studying exotic quantum phenomena in related materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_04549 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Observation of plaid-like spin splitting in a noncoplanar antiferromagnet Zhu, Yu-Peng Chen, Xiaobing Liu, Xiang-Rui Liu, Yuntian Liu, Pengfei Zha, Heming Qu, Gexing Hong, Caiyun Li, Jiayu Jiang, Zhicheng Ma, Xiao-Ming Hao, Yu-Jie Zhu, Ming-Yuan Liu, Wenjing Zeng, Meng Jayaram, Sreehari Lenger, Malik Ding, Jianyang Mo, Shu Tanaka, Kiyohisa Arita, Masashi Liu, Zhengtai Ye, Mao Shen, Dawei Wrachtrup, Jörg Huang, Yaobo He, Rui-Hua Qiao, Shan Liu, Qihang Liu, Chang Materials Science Spatial, momentum and energy separation of electronic spins in condensed matter systems guides the development of novel devices where spin-polarized current is generated and manipulated. Recent attention on a set of previously overlooked symmetry operations in magnetic materials leads to the emergence of a new type of spin splitting, enabling giant and momentum-dependent spin polarization of energy bands on selected antiferromagnets. Despite the ever-growing theoretical predictions, the direct spectroscopic proof of such spin splitting is still lacking. Here, we provide solid spectroscopic and computational evidence for the existence of such materials. In the noncoplanar antiferromagnet MnTe$_2$, the in-plane components of spin are found to be antisymmetric about the high-symmetry planes of the Brillouin zone, comprising a plaid-like spin texture in the antiferromagnetic (AFM) ground state. Such an unconventional spin pattern, further found to diminish at the high-temperature paramagnetic state, stems from the intrinsic AFM order instead of spin-orbit coupling (SOC). Our finding demonstrates a new type of quadratic spin texture induced by time-reversal breaking, placing AFM spintronics on a firm basis and paving the way for studying exotic quantum phenomena in related materials. |
| title | Observation of plaid-like spin splitting in a noncoplanar antiferromagnet |
| topic | Materials Science |
| url | https://arxiv.org/abs/2303.04549 |