title: Giant cluster coexistence in doped manganites and other compounds
abstract: 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.
authors.affiliation: National High Magnetic Field Lab and Department of Physics, Florida State University, Tallahassee, Florida 32306, USA.
authors.initials: A
authors.lastname: Moreo
authors.initials: M
authors.lastname: Mayr
authors.initials: A
authors.lastname: Feiguin
authors.initials: S
authors.lastname: Yunoki
authors.initials: E
authors.lastname: Dagotto