261 citations · 705 across the 11 of their papers we have counts for
11 papers
Theory of percolation and tunneling regimes in nanogranular metal films
C. Grimaldi
Nanogranular metal composites, consisting of immiscible metallic and insulating phases deposited on a substrate, are characterized by two distinct electronic transport regimes depe…
Depletion interaction effects on the tunneling conductivity of nanorod suspensions
B. Nigro, C. Grimaldi, M. A. Miller +2
We study by simulation and theory how the addition of insulating spherical particles affects the conductivity of fluids of conducting rods, modeled by spherocylinders. The electric…
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,…
Tunneling conductivity in composites of attractive colloids
B. Nigro, C. Grimaldi, M. A. Miller +2
In conductor-insulator nanocomposites in which conducting fillers are dispersed in an insulating matrix the electrical connectedness is established by interparticle tunneling or ho…
Transport properties of nonhomogeneous segregated composites
B. Nigro, G. Ambrosetti, C. Grimaldi +2
In conductor-insulator composites in which the conducting particles are dispersed in an insulating continuous matrix the electrical connectedness is established by interparticle qu…
Solution of the tunneling-percolation problem in the nanocomposite regime
G. Ambrosetti, C. Grimaldi, I. Balberg +3
We noted that the tunneling-percolation framework is quite well understood at the extreme cases of percolation-like and hopping-like behaviors but that the intermediate regime has…
Large polaron formation induced by Rashba spin-orbit coupling
C. Grimaldi
Here the electron-phonon Holstein model with Rashba spin-orbit interaction is studied for a two dimensional square lattice in the adiabatic limit. It is demonstrated that a delocal…
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…
Critical behavior of the piezoresistive response in RuO2-glass composites
C. Grimaldi, T. Maeder, P. Ryser +1
We re-analyse earlier measurements of resistance R and piezoresistance K in RuO2-based thick-film resistors. The percolating nature of transport in these systems is well accounted…
Gauge factor of thick film resistors: outcomes of the variable range hopping model
C. Grimaldi, P. Ryser, S. Straessler
Despite a large amount of data and numerous theoretical proposals, the microscopic mechanism of transport in thick film resistors remains unclear. However, recent low temperature m…
The small polaron crossover: comparison between exact results and vertex correction approximation
M. Capone S. Ciuchi, C. Grimaldi
We study the crossover from quasi free electron to small polaron in the Holstein model for a single electron by means of both exact and self-consistent calculations in one dimensio…