Hybrid higher-order skin-topological effect in hyperbolic lattices

Abstract

The hyperbolic lattice, existing in a space of constant negative curvature, displays unique physical properties compared to its Euclidean counterpart, and has garnered significant attention recently. Here, the authors have proposed the existence of a higher-order skin-topological effect in hyperbolic lattices. This result first introduces a non-Hermitian effect into hyperbolic lattices, which extends the regime of topological phases with hyperbolic geometry.