(a) Raman spectra in cross polarization configuration (e_i ⊥ e_s) collected by rotating light polarizations at 10 K and 300 K. (b) and (c) Intensity plots with respect to the rotation angle for A_g modes in cross channel ( e i ⊥ e s ) at 10 K and 300 K, respectively. The red (black) dots are the experimental data of 128.4 cm⁻¹ (71.1 cm⁻¹) modes and the solid curves are fitting curves using the intensity functions (2). The e_i and e_s represent the polarizations of the incident and scattered light, respectively.