Explanation of Giant Cluster Coexistence in Doped Manganites and Other Compounds

Details Explanation of Giant Cluster Coexistence in Doped Manganites and Other Compounds Explanation of Giant Cluster Coexistence in Doped Manganites and Other Compounds

1999-11-29

arxiv.org/abs/cond-mat/9911448v1

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, Tex, 3 ps figures. Submitted Nov 12, 1999

Scientific paper

10.1103/PhysRevLett.84.5568

Computational studies show the generation of large coexisting metallic and insulating clusters with equal electronic density in models for manganites. The clusters are induced by disorder on exchange and hopping amplitudes near first-order transitions of the non-disordered strongly coupled system. The random-field Ising model is used to explain the qualitative aspects of our results. Percolative characteristics are natural in this context. Our results explain the recently experimentally discovered micrometer size inhomogeneities in manganites. The conclusions are general and apply to a variety of compounds.

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