Arroyo Gascón, OlgaBravo, SergioChico Gómez, Leonor MaríaPacheco, Mónica2025-07-302025-07-302025-06-20Arroyo-Gascón, O., Bravo, S., Chico, L. and Pacheco, M., 2025. Fractional corner charges in threefold-symmetric two-dimensional materials with fragile topology. Physical Review Research, 7(2), p.023282.10.1103/qcr8-jxvnhttps://hdl.handle.net/20.500.14352/122941Grant No. 1211913We perform a systematic study of the signatures of fragile topology in over 50 nonmagnetic two-dimensional materials with formula AB2, belonging to space group P3m1. Using group theory analysis in the framework of topological quantum chemistry, we find fragile bands near the Fermi level for all the materials studied. Since stable topological bands are also present in these systems, the interplay of both phases is discussed, showing that corner charges appear in over 80% of the materials and are linked to fragile topology. Using first-principles calculations, we predict fractionally charged corner charges protected by C3 symmetry. Our work aims to broaden the scope of materials with experimentally accessible fragile bands.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/journal article2643-1564https://doi.org/10.1103/qcr8-jxvnhttps://journals.aps.org/prresearch/abstract/10.1103/qcr8-jxvnopen access538.9Topological materials2-dimensional systemsTransition metal dichalcogenidesSymmetriesFísica de materiales2211 Física del Estado Sólido