Phys. Rev. Lett. 84, 5568–5571 (2000)Giant Cluster Coexistence in Doped Manganites and Other CompoundsReceived 14 January 2000; published in the issue dated 12 June 2000 Computational studies of models for manganese oxides show the generation of large coexisting metallic and insulating clusters with equal electronic density, in agreement with the recently discovered micrometer-sized inhomogeneities in manganites. The clusters are induced by disorder on exchange and hopping amplitudes near first-order transitions of the nondisordered strongly coupled system. The random-field Ising model illustrates the qualitative aspects of our results. Percolative characteristics are natural in this context. The conclusions are general and apply to a variety of compounds. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.5568
DOI:
10.1103/PhysRevLett.84.5568
PACS:
71.10.-w, 75.10.-b, 75.30.Kz
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