The electronic structure of monolayer pentagonal palladium diselenide (PdSe2) is analyzed from the topological band theory perspective. Employing first-principles calculations, effective models and symmetry indicators, we find that the low-lying conduction bands are topologically nontrivial, protected by time reversal and crystalline symmetries. Numerical evidence supporting the nontrivial character of the bands is presented. Furthermore, we obtain a relevant physical response from the topological viewpoint, such as the spin Hall conductivity.
@article{arxiv.2202.03963,
title = {Topological bands in the PdSe$_2$ pentagonal monolayer},
author = {Sergio Bravo and M. Pacheco and J. D. Correa and Leonor Chico},
journal= {arXiv preprint arXiv:2202.03963},
year = {2023}
}
Comments
Published version, 8 pages + 6 figures. SI included