5.43.1. xc.lda_c_chachiyo_mod.chachiyo_scaling_mod¶ eminus.xc.lda_c_chachiyo_mod.chachiyo_scaling_mod(zeta)[source]¶ Weighting factor between the paramagnetic and the ferromagnetic case. Reference: Comput. Theor. Chem. 1172, 112669. Parameters: zeta – Relative spin polarization. Returns: Weighting factor and its derivative.