Transversal flexoelectric coefficient for nanostructures at finite deformations from first principles

We present a formulation for calculating the transversal flexoelectric coefficient of nanostructures at finite deformations from first principles. Specifically, we introduce concept radial polarization to make well-defined quantity uniform bending deformations. use framework calculate group IV atomic monolayers using density functional theory. find that graphene's is significantly larger than previously reported, with charge transfer mechanism differs other members its group.