The development of dislocation core models in metals with non close-packed crystalline structures was reviewed. The paper began with the Peierls-Nabarro model, as generalized to the case of non-planar cores, for the description of dislocation splitting in body-centered cubic metals. Atomistic studies of dislocation cores in body-centered cubic metals and intermetallic compounds with L12 and B2 structures were then considered, and the principal features of non-planar cores were emphasized. An analogy between dislocations in solids, and disclinations in liquid crystals, was presented. Similarities and differences in the treatment of the core structures of these defects in solid and liquid crystals were pointed out.

Models of the Cores of Dislocations in Metals and Disclinations in Liquid Crystals. V.Vitek, L.Lejcek, V.Paidar: Czechoslovak Journal of Physics, 1995, 45[11], 1003-10