General description of homogeneous isotropic disordered systems

As the mobility edge is approached the lo- calization length gets longer, and in some energy range close to the mobility edge there must be ma- ny localized states overlapping

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absorption of energy by the set of two-level systems constituted by potential wells with the distribution function of relaxation times 1p’R (T). (i) The exponential

method which has in particular been used with a fair Figure 1 shows for example the density of states of a success to study a large number of physical properties simple

It is shown that the energy spectrum consists of regions of extended and of regions of localized states separated by critical energies of sharp transition termed mobility

conductance fluctuation (UCF) of the two-probe conductance in the regime 2.5t 6t in 1D disordered quantum systems in the absence of any inelastic scattering, 1-e-, at zero or a

In fact the only cluster approximation in the literative which meets these diagonality requirements is the cluster coherent potential approximation CCPA of Tsukada

Among the possible techniques for obtaining the density of states from its low order moments, the best one, using a continued fraction expansion of its Hilbert