Energy Gaussian disorder model

One famous formalism is the Gaussian Disorder Model (GDM) proposed by BSssler and co-workers [27], where the distribution of the site energies is assumed to be Gaussian, width cr, which is referred to as the energetic disorder parameter (units of energy). The sites themselves are positionally displaced from a (cubic) lattice. The displacements from the lattice positions also follow a Gaussian distribution of normalised deviation S, referred to as the positional disorder parameter (dimensionless). 

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