Short-range polaron correlations in the ferromagnetic La1-xCaxMnO3

We use neutron scattering to demonstrate the presence of lattice polarons and their short-range correlations fur several samples of La1-xCaxMnO3 in the Ca doping range 0.15 less than or equal to x less than or equal to 0.3. We establish the duping dependence of the orientation, commensuration, and coherence length of the polaron correlations and show that the populations of correlated and uncorrelated polarons are intimately related to the transport properties of the materials.