Debye temperature of ternary chalcopyrite semiconductors

Debye temperature (??_D) of A^IB^IIIC₂ ^VI and A^IIB^IVC₂ ^V chalcopyrite semiconductors have been calculated using plasma frequency formalism. Six simple relations have been proposed to calculate the values of ??_D. Two are based on plasmon energy data and one each on molecular weight (W), melting temperature (T_m), ionicity (f_i) and energy gap (E_g). The calculated values of ??_D from all equations are compared with the experimental values and the values reported by different workers. Reasonably good agreement has been obtained between them.