Figure 1:

The structure and characterization of Ta₂NiS₅. (a) Schematics of the layered Ta₂NiS₅ crystal structure. (b) AFM image and the thickness of the Ta₂NiS₅ flake. (c) Typical polarized Raman spectra of the Ta₂NiS₅ flake measured by 532 nm laser with different polarization angles. (d) The anisotropic Raman intensity of ²A_g mode. The black dots and red curve are experimental data and fitting result, respectively. (e) Polarization-dependent linear absorption spectra from 0° to 90°. (f) Polar plot of the linear absorption at 800 nm.