Kavli Affiliate: Gang Su
| First 5 Authors: He-Lin Li, He-Lin Li, , ,
| Summary:
The nonlinear Hall effect (NLHE) can induce optical anisotropy by modifying a
material’s dielectric tensor, presenting opportunities for novel
characterization and device applications. While the magneto-optical Kerr effect
(MOKE) probes the linear Hall effect (LHE) in magnetic materials, an analogous
optical probe for NLHE in non-magnetic, time-reversal symmetric systems remains
highly desirable. Here, we theoretically propose and investigate an
NLHE-induced Electro-optic Kerr Effect (EOKE) as such a probe. Focusing on
monolayer (ML) WTe$_2$, a prototypical NLHE material, our analysis considers
contributions from Berry curvature dipole (BCD), Drude, injection, and shift
mechanisms. We demonstrate that the EOKE signal in WTe$_2$ is predominantly
governed by the BCD. Furthermore, the Kerr angle exhibits temporal oscillations
at different optical frequencies, suggesting EOKE as a promising route for the
time-resolved detection of NLHE and the dynamic investigation of material
topology.
| Search Query: ArXiv Query: search_query=au:”Gang Su”&id_list=&start=0&max_results=3