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: http://semiconductors.phys.msu.ru/publ/zv2001-1.html
Дата изменения: Thu Apr 11 16:08:51 2002 Дата индексирования: Mon Oct 1 20:42:16 2012 Кодировка: |
It is shown that the conductivity of granular metals on the insulating side of the metal--insulator transition can be essentially determined by inter-grain tunneling via virtual localized states of intermediate grains. This mechanism gives rise to conductivity temperature dependence of the form ln(sigma)=const-(T0/T)x, where x is about 0.4, and to a large enhancement of the conductivity.