Extremely anisotropic results had previously been reported for electrical conduction in plastically deformed crystals. This effect was found to be substantially reduced if the distance between the electrodes that were used for conductivity measurements was decreased to sub-mm ranges. Transmission electron microscopy revealed that the dislocations which were introduced were very heterogeneous and were localized into slip bands. The very marked anisotropy, and the less marked but significant anisotropy, that were observed in thin specimens were interpreted in terms of slip bands. These were considered to act as highly resistive layers.

Y.Mera, K.Maeda, S.Hyodo: Physica Status Solidi A, 1989, 111[1], 223-32