The interplay between Arrhenius and hopping conduction mechanisms in a percolating nanowire network

Variable range hopping and thermally activated transport in molybdenum-based MXenes

“…Due to the voids between flakes (Fig. 1), the sample cannot be considered as homogeneous at the microscopic level but is probably subject to percolation [48,64,65]. Since here the MXene volume is clearly not equal to the total volume (see Fig.…”

“…Percolation is compatible with a conductivity prefactor that is σ min , while maintaining an activation energy E A close to, but higher than, the annealed Mo 2 C samples (see Table I), since the current in the percolation paths still has to be controlled by the same kind of activated process. All the aforementioned considerations are justified on the basis of numerical calculations in a system somewhat similar to the one explored here, but for the fact that flakes are replaced by nanowires [65]. In Ref.…”

“…In Ref. [65], it is also shown that in the case of complex percolation paths one can still consider both VRH and activated regimes as acting in parallel.…”

Manipulation of the Bilateral Electron Transport across a Graphdiyne-Based Heterostructure

“…As the uneven geometry exists even in a microscopic picture, the deposited GDY is not perfectly fitted to the substrate, resulting in varying distances between GDY and NiO/Ni foam (Figure h). In this case, the system shall be considered as a disordered system, and the electron transfer across the heterostructure shall be considered as a variable range-hopping process. − The conductivity of the variable range-hopping process is written as where σ 0 is a constant for conductivity and T 0 is a characteristic temperature, while the relation parameter x is determined by the materials . In our case, where the density of states near the Fermi level is not significantly dependent on energy, the value of x can be estimated to be 1/4…”

A Study of Visible-Blind Properties of a SnO2’s Nanowires Network Photodetector

“…Therefore, the observed results are the average response of many nanowires being excited. In other words, the electrical response we observe is the randomly percolation pathway chosen by the current to flow from one electrical contact to another, passing through nanowires' homojunctions with different surface/volume ratios [21].…”