PMC Physics B

Table 2 Experimental, calculated total and intra-inter- band of the zero frequency of the real part of the $χ_{123}^{(2)} (ω)$ . χ¹²³(0) is expressed in units of 1 × 10^-8 esu.

From: Electronic structure, linear, nonlinear optical susceptibilities and birefringence of CuInX₂(X = S, Se, Te) chalcopyrite-structure compounds

	CuInS₂	CuInSe₂	CuInTe₂
χ¹²³(0)exp.	14^a, 11^b
χ¹²³(0)total	31.7^c, 18*	72.5^c, 90*	126.0^c, 135*
χ¹²³(0)inter	-51.8^c, -57*	-115.0^c, -110*	-187.2^c, -205*
χ¹²³(0)intra	83.5^c,75*	187.5^c,200*	313.2^c, 340*
χ³¹²(0)total pm/V	-45.3*	-28.2*	8.5*
d₃₆ pm/V (Ref.34)	-22.48^d	-14.51^d	3.85*
χ³¹²(0)total = 2d₃₆ Pm/V	-44.96**	-29.02**	7.7**

^aRef.36 ^bRef.51 ^cRef.17 ^dRef.31.
*This work ** The value of χ¹²³(0)total (pm/V), calculated from d₃₆ (Ref. 31).

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