Unprecedented Integral-Free Debye Temperature Formulas: Sample Applications to Heat Capacities of ZnSe and ZnTe

Figure 6

Fittings via (35) of the data points () corresponding to the cryogenic data provided by Kremer et al. [46] for ZnSe and ZnTe [—, least-mean square fittings from 2 K to 8.7 K or to 6.4 K, resp.; ⋅⋅–⋅⋅–⋅⋅–⋅⋅, tail behaviour, for 0; ⋅–⋅–⋅–⋅, asymptote, for and ]. The insets show the effective values () following directly (via (25)) from Kremer’s cryogenic data [46] for ZnSe and ZnTe. For comparison we have still included the values (+) following from former data quoted for ZnSe by Birch [34], which show no indication for an appreciable electronic contribution. The continuous curves in the insets are resulting from (25), implying the cryogenic series expansion (see (33)), with fitted Taylor series expansion coefficients listed in Table 3. —, curve, for > 0;   – – – – –,    curve, for 0..