Gapless Topological Peierls-like instabilities in more than one dimension
Other Condensed Matter
2025-11-07 v2 Strongly Correlated Electrons
Superconductivity
Abstract
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.
Keywords
Cite
@article{arxiv.2503.21063,
title = {Gapless Topological Peierls-like instabilities in more than one dimension},
author = {Santiago Palumbo and Pablo S. Cornaglia and Jorge I. Facio},
journal= {arXiv preprint arXiv:2503.21063},
year = {2025}
}