Gapless Topological Peierls-like instabilities in more than one dimension
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912689386684416 |
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| author | Palumbo, Santiago Cornaglia, Pablo S. Facio, Jorge I. |
| author_facet | Palumbo, Santiago Cornaglia, Pablo S. Facio, Jorge I. |
| contents | A periodic lattice distortion that reduces the translational symmetry folds electron bands into a reduced Brillouin zone, leading to band mixing and a tendency to gap formation, as in the Peierls transition in one-dimensional systems. However, in higher dimensions, the resulting phase can present topological obstructions preventing a complete gap opening. We discuss two different mechanisms for such obstructions, emergent Weyl nodes and symmetry protected band crossings. Based on density-functional calculations, we show these mechanisms are at play in trigonal PtBi$_2$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_21063 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Gapless Topological Peierls-like instabilities in more than one dimension Palumbo, Santiago Cornaglia, Pablo S. Facio, Jorge I. Other Condensed Matter Strongly Correlated Electrons Superconductivity A periodic lattice distortion that reduces the translational symmetry folds electron bands into a reduced Brillouin zone, leading to band mixing and a tendency to gap formation, as in the Peierls transition in one-dimensional systems. However, in higher dimensions, the resulting phase can present topological obstructions preventing a complete gap opening. We discuss two different mechanisms for such obstructions, emergent Weyl nodes and symmetry protected band crossings. Based on density-functional calculations, we show these mechanisms are at play in trigonal PtBi$_2$. |
| title | Gapless Topological Peierls-like instabilities in more than one dimension |
| topic | Other Condensed Matter Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2503.21063 |