In this Letter, we provide conclusive evidence for a lattice like arrangement of the silver grains in the nanogranular Ag-Al2O3 metal. The evidence for the presence of clearly separated first and second near neighbor grains was derived from the electrical conductivity dependence on the metallic content in these composites. The data were analyzed in light of the tunneling percolation staircase model that we have recently suggested for lattices or systems with discrete well-defined interparticle distances in the continuum. (C) 2014 AIP Publishing LLC.
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Bar Ilan Univ, Minerva Ctr, Jack & Pearl Resnick Inst Adv Technol, IL-52900 Ramat Gan, Israel
Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, IsraelBar Ilan Univ, Minerva Ctr, Jack & Pearl Resnick Inst Adv Technol, IL-52900 Ramat Gan, Israel
Strelniker, Yakov M.
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Frydman, Aviad
Havlin, Shlomo
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Bar Ilan Univ, Minerva Ctr, Jack & Pearl Resnick Inst Adv Technol, IL-52900 Ramat Gan, Israel
Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, IsraelBar Ilan Univ, Minerva Ctr, Jack & Pearl Resnick Inst Adv Technol, IL-52900 Ramat Gan, Israel