Consequences of anisotropy in electrical charge storage: application to   the characterization by the mirror method of TiO2 rutile
  This article is devoted first to anisotropic distributions of stored electric charges in isotropic materials, second to charge trapping and induced electrostatic potential in anisotropic dielectrics. On the one hand, we examine the case of anisotropic trapped charge distributions in linear homogeneous isotropic (LHI) insulators, obtained after an electron irradiation in a scanning electron microscope. This injection leads to the formation of a mirror image. 
Gilles Damamme, Christelle Guerret-Piecourt (LTDS), Temga Temga   (LTDS), D. Juv\'e (LTDS), D. Tr\'eheux (LTDS)