The direct current electrical conductivity tensor of biotitic phyllosilicates (mica) has been measured as a function of temperature, of electric field, and of chemical composition. It is found that conductivity depends exponentially upon iron impurity content, and upon electric field at high fields. The dependence upon temperature is more complicated. These results are best interpreted by a model in which mica is an isotropic Fermi glass in which electrical conduction takes places by nonadiabatic hopping of small polarons between iron sites in the crystal.
No takes yet. Share an insight, caveat, or question.
Meunier et al. (1983) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: