This is a short review of the current state of theory and experiment on the structure of elastic lattices weakly interacting with underlying random background. Examples are flux lattices in superconductors, magnetic bubble lattices in ferromagnetic films, charge density waves in semiconductors, and atomic monolayers physisorbed on random surfaces. We shall argue that the orientational order in these systems persists at longer scales than the translational order. The law of the decay of both types of order will be analysed, with the emphasis on its practical implications for superconductors. The depinning transition will be discussed in terms of the mobility of the lattice.
KeywordsCharge Density Wave Orientational Order Vortex Lattice Flux Line Ferromagnetic Film
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