Abstract
In this chapter it is shown that the density of states has two humps in its dependence on energy. Because of Coulombic correlations, the density of states vanishes at the Fermi level. This has an important effect on the temperature dependence of hopping conduction, especially in the variablerange hopping region. The existence of correlation implies that the random resistor network model, which underlies the theory of hopping conduction desribed in the preceding chapters, becomes strictly speaking inadequate. The model remains useful for physical problems, but its use requires special justification.
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Shklovskii, B.I., Efros, A.L. (1984). Correlation Effects on the Density of States and Hopping Conduction. In: Electronic Properties of Doped Semiconductors. Springer Series in Solid-State Sciences, vol 45. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-02403-4_10
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DOI: https://doi.org/10.1007/978-3-662-02403-4_10
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