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Effect of electric field on diffusion in disordered materials
Author(s) -
Jansson F.,
Nenashev A.V.,
Baranovskii S.D.,
Gebhard F.,
Österbacka R.
Publication year - 2009
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.200910405
Subject(s) - statistical physics , gaussian , field (mathematics) , gaussian random field , random field , electric field , cluster (spacecraft) , distribution (mathematics) , spatial distribution , diffusion , physics , materials science , gaussian process , statistics , mathematics , quantum mechanics , mathematical analysis , computer science , pure mathematics , programming language
The effect of electric field on diffusion of charge carriers in disordered materials is studied by Monte Carlo computer simulations and analytical calculations. It is shown how an electric field enhances the diffusion coefficient in the hopping transport mode. The enhancement essentially depends on the temperature and on the energy scale of the disorder potential. It is shown that in one‐dimensional hopping the diffusion coefficient depends linearly on the electric field, while for hopping in three dimensions the dependence is quadratic.