2025/03/27 by Santiago Palumbo, Pablo S. Cornaglia, Palumbo, Santiago +3 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #Other Condensed Matter (cond-mat.other) #Quantum chaos and dynamical systems #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.2503.21063
openalex publication_date 2025/03/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
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 PtBi2.