Ja. Delrio et al., FORMULA FOR THE CONDUCTIVITY OF A 2-COMPONENT MATERIAL BASED ON THE RECIPROCITY THEOREM, Solid state communications, 106(4), 1998, pp. 183-186
In this communication we obtain an approximate formula for the effecti
ve electrical conductivity for a two-component two-dimensional materia
l. The basis of the formula is Keller's reciprocity theorem. The deriv
ed formula satisfies the reciprocity condition at-all values of the co
ncentration, and the predictions of the formula agree well with data o
n the electrical conductivity of several two-component materials. (C)
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