Light-induced half-quantized Hall effect and axion insulator

F Qin, CH Lee, R Chen - Physical Review B, 2023 - APS
Motivated by the recent experimental realization of the half-quantized Hall effect phase in a
three-dimensional (3D) semimagnetic topological insulator [M. Mogi, Nat. Phys. 18, 390 …

Optical conductivity of a topological system driven using a realistic pulse

R Seshadri, T Pereg-Barnea - Physical Review B, 2023 - APS
The effect of a time-periodic perturbation, such as radiation, on a system otherwise at
equilibrium has been studied in the context of Floquet theory with stationary states replaced …

Emergent Weyl-like points in periodically modulated systems and Floquet engineering

F Qin, R Chen - arXiv preprint arXiv:2412.04352, 2024 - arxiv.org
We investigate a three-dimensional topological phase resembling a Weyl semimetal,
modulated by a periodic potential and engineered through Floquet dynamics. This system is …