Berry-dipole Semimetals
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866912049126178816 |
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| author | Zhuang, Zheng-Yang Zhang, Chaoyi Wang, Xiao-Jiao Yan, Zhongbo |
| author_facet | Zhuang, Zheng-Yang Zhang, Chaoyi Wang, Xiao-Jiao Yan, Zhongbo |
| contents | We introduce ''Berry-dipole semimetals'', whose band degeneracies are characterized by quantized Berry dipoles. Through a two-band model constructed by Hopf map, we reveal that the Berry-dipole semimetals display a multitude of salient properties distinct from other topological semimetals. On the boundary, we find that the first-order Berry-dipole semimetal harbors anomalous paired Fermi arcs with the same spin polarization, even though the layer Chern number is zero, and the second-order Berry-dipole semimetal hosts dispersionless hinge arcs. In the bulk, we find that the low-energy Berry-dipole Hamiltonian near the band node has a quadratic energy dispersion and peculiar Berry curvature, which give rise to rather unique characteristics in the intrinsic anomalous Hall effect, orbital magnetization and Landau levels. Our study shows that Berry-dipole semimetals are a class of topological gapless phases supporting rich intriguing physics. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2404_10049 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Berry-dipole Semimetals Zhuang, Zheng-Yang Zhang, Chaoyi Wang, Xiao-Jiao Yan, Zhongbo Mesoscale and Nanoscale Physics Materials Science Quantum Gases Quantum Physics We introduce ''Berry-dipole semimetals'', whose band degeneracies are characterized by quantized Berry dipoles. Through a two-band model constructed by Hopf map, we reveal that the Berry-dipole semimetals display a multitude of salient properties distinct from other topological semimetals. On the boundary, we find that the first-order Berry-dipole semimetal harbors anomalous paired Fermi arcs with the same spin polarization, even though the layer Chern number is zero, and the second-order Berry-dipole semimetal hosts dispersionless hinge arcs. In the bulk, we find that the low-energy Berry-dipole Hamiltonian near the band node has a quadratic energy dispersion and peculiar Berry curvature, which give rise to rather unique characteristics in the intrinsic anomalous Hall effect, orbital magnetization and Landau levels. Our study shows that Berry-dipole semimetals are a class of topological gapless phases supporting rich intriguing physics. |
| title | Berry-dipole Semimetals |
| topic | Mesoscale and Nanoscale Physics Materials Science Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2404.10049 |