title: Coulomb interactions and nanoscale electronic inhomogeneities in manganites.
abstract: We study electronic inhomogeneities in manganites using simulations on a microscopic model with Coulomb interactions amongst two electronic fluids-one localized (polaronic), the other extended-and dopant ions. The long range Coulomb interactions frustrate phase separation induced by the large on site repulsion between the fluids. A single phase ensues which is inhomogeneous at a nanoscale, but homogeneous on mesoscales, with many features that agree with experiments. This, we argue, is the origin of nanoscale inhomogeneities in manganites, rather than phase competition or disorder effects.
authors.affiliation: Centre For Condensed Matter Theory, Indian Institute of Science, Bangalore 560 012, India.
authors.forename: Vijay B
authors.initials: VB
authors.lastname: Shenoy
authors.forename: Tribikram
authors.initials: T
authors.lastname: Gupta
authors.forename: H R
authors.initials: HR
authors.lastname: Krishnamurthy
authors.forename: T V
authors.initials: TV
authors.lastname: Ramakrishnan