Gapless topological Peierls-like instabilities in more than one dimension
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 ${\mathrm{PtBi}}_{2}$.
Authors
- Pablo S. Cornaglia (ORCID: https://orcid.org/0000-0003-4991-6573)
- Jorge I. Facio (ORCID: https://orcid.org/0000-0002-8506-2512)
- Santiago Palumbo (ORCID: https://orcid.org/0009-0009-4381-3208)
Institutions
- Consejo Nacional de Investigaciones Científicas y Técnicas (AR)
- Universidad Nacional de Cuyo (AR)
- Balseiro Institute (AR)
- Bariloche Atomic Centre (AR)
- Institut Català de Nanociència i Nanotecnologia (ES)
- Institut de Nanociència i Nanotecnologia de la Universitat de Barcelona
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2025-11-20
- DOI
- https://doi.org/10.1103/x6zl-t5hs
- Citations
- 1
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 1.25