Table 8.

Four-band PDOS4 model for total electron density log₁₀(n_t cm³). The four fitting parameters for a cubic polynomial fit Eq. (25) of the theoretical calculation for the total electron density in n-type, zinc blende GaAs at 300 K as a function of the Fermi energy relative to the bottom of the conduction Γ sub-band. This cubic polynomial fit, which represents the theoretical results for Eq. (3), is valid only when −0.0974 eV ≤ E_F ≤ 0.229 eV. The t-ratio is the absolute value of the estimated fitting parameter |a_ti| divided by its estimated standard deviation. The residual standard deviation is S_res = 0.0234.

Fitting parameter	Estimated value	Estimated standard deviation	Units	t-ratio
at0	17.5198	0.6519 × 10−2		2.687 × 103
at1	12.3461	0.9401 × 10−1	eV−1	1.31 × 102
at2	−35.5542	1.322	eV−2	26.90
at3	40.1630	6.488	eV−3	6.190