Observation of double percolation transitions in Ag-SnO${}_2$ nanogranular films

Yan-Fang Wei, Zhi-Qing Li

Two percolation transitions are observed in Ag${}_x$(SnO${}_2{)}_{1-x}$ nanogranular films with Ag volume fraction $x$ ranging from $\sim$0.2 to $\sim$0.9. In the vicinity of each percol…