Photonic spin Hall effect in Haldane model materials
Muzamil Shah, Muhammad Sabieh Anwar, Reza Asgari, Gao Xianlong
Abstract
We investigate the photonic spin Hall effect (PSHE) of light beams reflected from surfaces of various two-dimensional crystalline structures while considering their associated time-reversal $\mathcal{T}$ and inversion $\mathcal{I}$ symmetries. Using the modified Haldane model Hamiltonian with tunable parameters as a generic system, we explore longitudinal and transverse spin separations of the reflected beam in both topologically nontrivial and trivial systems. The PSHE observed in these materials is attributed to their topology. Topological phase transitions in buckled Xene monolayer materials are demonstrated through the PSHE, showing the manipulation of spin-orbit coupling and external electric fields. Moreover, we investigate spatial shifts in the PSHE of monolayer transition metal dichalcogenides, suggesting that the spin and valley degrees of freedom of charge carriers provide a promising avenue to manipulate the PSHE in both classes of these materials. The study suggests that the PSHE in Haldane model materials can serve as a metrological tool for characterizing topological phase transitions through quantum weak value measurement techniques.