Transport processes in metal-insulator granular layers

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dc.creatorPogorelov, Yu. G.
dc.creatorPolido, J. F.
dc.date2001-06-03
dc.date2001-06-14
dc.date.accessioned2026-07-07T02:41:38Z
dc.date.available2026-07-07T02:41:38Z
dc.descriptionThe non-equilibrium tunnel transport processes are considered in a square lattice of metallic nanogranules embedded into insulating host. Based on a simple model with three possible charging states (+,-, or 0) of a granule and three kinetic processes (creation or recombination of a +- pair, and charge transfer) between neighbor granules, the mean-field kinetic theory is developed, which takes into account the interplay between the charging energy and temperature and between the applied electric field and Coulomb fields by non-compensated charge density. The resulting charge and current distributions are found to depend essentially on the particular conditions in a granular layer, namely, in a free area (FA) or in contact areas (CA) under macroscopic metallic contacts. Thus, a steady state dc transport is only compatible with zero charge density and ohmic resistivity within FA, but charge accumulation and non-ohmic behavior are necessary for conduction over CA. The approximate analytic solutions are obtained for characteristic regimes (low or high charge density) of such conduction. Also non- stationary processes are considered, displaying a peculiar combination of two strongly different relaxation times. The comparison is done with the available transport data on similar experimental systems.
dc.description14 pages, 13 figures. Figures were reformatted for better reproduction, some formulations were sharpened
dc.identifierhttps://arxiv.org/abs/cond-mat/0106034
dc.identifierhttp://arxiv.org/abs/cond-mat/0106034
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/17820
dc.subjectMaterials Science
dc.titleTransport processes in metal-insulator granular layers
dc.typetext

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