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Fig. 10 The curves of C 1 versus carrier degeneracy under terahertz frequency in quaternary materials for (a) the band structure contains 3 energy band constants, (b) the band structure contains 2
energy band constants and (c) where the band structure defined by a single energy band constant
Fig. 11 The curves of C 1 versus x under terahertz frequency in ternary material for (a) the band
structure contains 3 energy band constants, (b) the band structure contains 2 energy band constants
and (c) where the band structure defined by a single energy band constant