261 citations · 738 across the 13 of their papers we have counts for
9 papers · 1 filter
Tunneling and percolation transport regimes in segregated composites
B. Nigro, C. Grimaldi, P. Ryser
We consider the problem of electron transport in segregated conductor-insulator composites in which the conducting particles are connected to all others via tunneling conductances,…
Filler Dependencies of Electrical Conductivity in Nanotube and Nanofiber Composites
G. Ambrosetti, C. Grimaldi, T. Maeder +2
We report on a model of polymer nanocomposites with fibrous fillers which explicitly considers the microscopic filler features and replicates the composites as random distributions…
Optimal Percolation of Disordered Segregated Composites
N. Johner, C. Grimaldi, T. Maeder +1
We evaluate the percolation threshold values for a realistic model of continuum segregated systems, where random spherical inclusions forbid the percolating objects, modellized by…
Tunneling-percolation origin of nonuniversality: theory and experiments
S. Vionnet-Menot, C. Grimaldi, T. Maeder +2
A vast class of disordered conducting-insulating compounds close to the percolation threshold is characterized by nonuniversal values of transport critical exponent t, in disagreem…
Strain modulation of transport criticality in heterogeneous solids
Sonia Vionnet, Claudio Grimaldi, Thomas Maeder +2
A vast class of disordered conducting-insulating compounds close to the percolation threshold is characterized by nonuniversal values of transport critical exponents. The lack of u…
A model of transport nonuniversality in thick-film resistors
C. Grimaldi, T. Maeder, P. Ryser +1
We propose a model of transport in thick-film resistors which naturally explains the observed nonuniversal values of the conductance exponent t extracted in the vicinity of the per…
Segregated tunneling-percolation model for transport nonuniversality
C. Grimaldi, T. Maeder, P. Ryser +1
We propose a theory of the origin of transport nonuniversality in disordered insulating-conducting compounds based on the interplay between microstructure and tunneling processes b…
Piezoresistivity and conductance anisotropy of tunneling-percolating systems
C. Grimaldi, T. Maeder, P. Ryser +1
Percolating networks based on interparticle tunneling conduction are shown to yield a logarithmic divergent piezoresistive response close to the critical point as long as the elect…
Piezoresistive anisotropy of percolative granular metals
C. Grimaldi, P. Ryser, S. Straessler
The piezoresistive response of granular metals under uniaxial strain is strongly dependent on the concentration of the conducting phase. Here we show that the piezoresistive anisot…