Fig. 5. The effects of transverse B^ext (perpendicular to spin direction) on calculated τ_s of free carriers of CsPbBr₃.

a The ratio of τ_s at B^ext=1 T and τ_s at B^ext=0 as a function of T. Here electron carrier density n_e=10¹⁸ cm⁻³. b Spin decay rates (${\tau }_s^{-1}$) of electrons and holes as a function of B^ext at 4 K with n_c = 10¹⁸ cm⁻³. c ${\tau }_s^{-1}$ as a function of B^ext at 4 K at different n_e. “Exp." (orange open diamond) represent our experimental data (with B^ext along [010] direction), where the density of photo-excited carriers is estimated about 10¹⁸ cm⁻³. The orange dashed line is the linear fit of experimental data. The linear relation between ensemble spin dephasing rate and B^ext was frequently found and used in previous experimental measurements^9,36,43,44.