Question:
A jogged edge dislocation in LiF lies parallel to the (110) surface, which is perpendicular to its Burgers vector. The dislocation contains a series of unit jogs, each with the same sign, spaced every 50 nm along its length. A stress is applied that makes the dislocation glide from the center side of a 1-mm cube until it exits the crystal. Assuming that the dislocation initially always lies parallel to the initial surface, estimate the current that flows across the sample.