Open Access Publications from the University of California

## Geometric current response in Chern systems and topological delocalization in Floquet class AIII systems

• Author(s): Brown, Albert
A Floquet insulator is a unitary time evolved system defined by a time periodic Hamiltonian. We first describe an existing model of a 1D chain with 2D onsite Hilbert space and chiral symmetry. Then we introduce a disordered model of the system and look at how its topological properties are robust to the disorder. We find a power law scaling of $\nu = 2$ for the localization-delocalization transition of the eigenstates of the unitary operator as the drive evolves towards the midway point of its evolution.