Orateur
Description
Topological phases of matter exhibit robust conducting edge states tied to invariants such as the Chern number. While well understood in crystalline systems due to presence of symmetries, their realization in disordered or amorphous materials remains less explored.
Here we study the evolution of a decorated honeycomb crystalline lattice to a hyperuniform amorphous system by introducing Stone–Wales (SW) defects that disrupt long-range order.
Using the topological Weaire–Thorpe Hamiltonian for electrons, we show that these defects can induce pseudo-band inversions and reverse the Chern number. With adiabatic arguments we predict the topological phase of the amorphous system and explain the band-inversion mechanism via effective hopping renormalization.