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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2408.08394 |
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| _version_ | 1866909288650244096 |
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| author | Yang, Xian P. Yao, Yueh-Ting Zheng, Pengyu Guan, Shuyue Zhou, Huibin Cochran, Tyler A. Lin, Che-Min Yin, Jia-Xin Zhou, Xiaoting Cheng, Zi-Jia Li, Zhaohu Shi, Tong Hossain, Md Shafayat Chi, Shengwei Belopolski, Ilya Jiang, Yu-Xiao Litskevich, Maksim Xu, Gang Tian, Zhaoming Bansil, Arun Yin, Zhiping Jia, Shuang Chang, Tay-Rong Hasan, M. Zahid |
| author_facet | Yang, Xian P. Yao, Yueh-Ting Zheng, Pengyu Guan, Shuyue Zhou, Huibin Cochran, Tyler A. Lin, Che-Min Yin, Jia-Xin Zhou, Xiaoting Cheng, Zi-Jia Li, Zhaohu Shi, Tong Hossain, Md Shafayat Chi, Shengwei Belopolski, Ilya Jiang, Yu-Xiao Litskevich, Maksim Xu, Gang Tian, Zhaoming Bansil, Arun Yin, Zhiping Jia, Shuang Chang, Tay-Rong Hasan, M. Zahid |
| contents | The interplay of topology, magnetism, and correlations gives rise to intriguing phases of matter. In this study, through state-of-the-art angle-resolved photoemission spectroscopy, density functional theory and dynamical mean-field theory calculations, we visualize a fourfold degenerate Dirac nodal line at the boundary of the bulk Brillouin zone in the antiferromagnet YMn2Ge2. We further demonstrate that this gapless, antiferromagnetic Dirac nodal line is enforced by the combination of magnetism, space-time inversion symmetry and nonsymmorphic lattice symmetry. The corresponding drumhead surface states traverse the whole surface Brillouin zone. YMn2Ge2 thus serves as a platform to exhibit the interplay of multiple degenerate nodal physics and antiferromagnetism. Interestingly, the magnetic nodal line displays a d-orbital dependent renormalization along its trajectory in momentum space, thereby manifesting Hund coupling. Our findings offer insights into the effect of electronic correlations on magnetic Dirac nodal lines, leading to an antiferromagnetic Hund nodal line. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_08394 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A topological Hund nodal line antiferromagnet Yang, Xian P. Yao, Yueh-Ting Zheng, Pengyu Guan, Shuyue Zhou, Huibin Cochran, Tyler A. Lin, Che-Min Yin, Jia-Xin Zhou, Xiaoting Cheng, Zi-Jia Li, Zhaohu Shi, Tong Hossain, Md Shafayat Chi, Shengwei Belopolski, Ilya Jiang, Yu-Xiao Litskevich, Maksim Xu, Gang Tian, Zhaoming Bansil, Arun Yin, Zhiping Jia, Shuang Chang, Tay-Rong Hasan, M. Zahid Strongly Correlated Electrons Materials Science Applied Physics The interplay of topology, magnetism, and correlations gives rise to intriguing phases of matter. In this study, through state-of-the-art angle-resolved photoemission spectroscopy, density functional theory and dynamical mean-field theory calculations, we visualize a fourfold degenerate Dirac nodal line at the boundary of the bulk Brillouin zone in the antiferromagnet YMn2Ge2. We further demonstrate that this gapless, antiferromagnetic Dirac nodal line is enforced by the combination of magnetism, space-time inversion symmetry and nonsymmorphic lattice symmetry. The corresponding drumhead surface states traverse the whole surface Brillouin zone. YMn2Ge2 thus serves as a platform to exhibit the interplay of multiple degenerate nodal physics and antiferromagnetism. Interestingly, the magnetic nodal line displays a d-orbital dependent renormalization along its trajectory in momentum space, thereby manifesting Hund coupling. Our findings offer insights into the effect of electronic correlations on magnetic Dirac nodal lines, leading to an antiferromagnetic Hund nodal line. |
| title | A topological Hund nodal line antiferromagnet |
| topic | Strongly Correlated Electrons Materials Science Applied Physics |
| url | https://arxiv.org/abs/2408.08394 |