Dislocation Dipole in a Strained Nanostructured Layer Buried in an Infinite-Size Matrix

Abstract

Abstract The equilibrium positions of a dipole of edge dislocations embedded in a nanostructure composed of a strained two-dimensional layer buried in an infinite-size matrix with a rectangular nanowire located at the upper layer–matrix interface have been determined from a Peach–Koëhler force calculation. The location of the unstable and stable equilibrium positions of the dislocations of the dipole gliding in the horizontal plane has been specified in the nanostructure versus the misfit strain and nanowire aspect ratio. The critical misfit below which the dipole has no equilibrium position has been finally determined versus the size of the nanowire.