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Longitudinal and transversal piezoresistive response of granular metals

C. Grimaldi·P. Ryser·S. Straessler
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Abstract

In this paper, we study the piezoresistive response and its anisotropy for a bond percolation model of granular metals. Both effective medium results and numerical Monte Carlo calculations of finite simple cubic networks show that the piezoresistive anisotropy is a strongly dependent function of bond probability p and of bond conductance distribution width Δg. We find that piezoresistive anisotropy is strongly suppressed as p is reduced and/or Δg is enhanced and that it vanishes at the percolation thresold p=p_c. We argue that a measurement of the piezoresistive anisotropy could be a sensitive tool to estimate critical metallic concentrations in real granular metals.

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C. Grimaldi, P. Ryser, S. Straessler. 2001-03-01. Longitudinal and transversal piezoresistive response of granular metals. https://doi.org/10.1103/physrevb.64.064201

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