Dynamical Mean Field Study of Model Double-Exchange Superlattices

Abstract

A theoretical study of [001] "double exchange" superlattices is presented. The superlattice is defined in terms of an $AB$O${}_3$ perovskite crystal. Itinerant electrons hop among the B sites according to a nearest-neighbor tight binding model and are coupled to classical "core spins". The $A$ sites contain ionic charges arranged to form an [001] superlattice which forces a spatial variation of the mobile electron charge on the $B$ sites. The double-exchange interaction is treated by the dynamical mean field approximation, while the long range Coulomb interaction is taken into account by the Hartree approximation. We find the crucial parameter is the Coulomb screening length. Different types of phases are distinguished and the interfaces between them classified.

4 pages, f figures

References in corpus (10)

• Phase Separation in Electronic Models for Manganites
• On the Fermi Liquid to Polaron Crossover II: Double Exchange and the Physics of "Colossal" Magnetoresistance
• On the Fermi Liquid to Polaron Crossover I: General Results
• Magnetoresistance of the Double-Exchange Model in Infinite Dimension
• Spatial inhomogeneity and strong correlation physics: a dynamical mean field study of a model Mott-insulator/band-insulator heterostructure
• Metallic surface of a Mott insulator - Mott insulating surface of a metal
• Magnetocapacitance and exponential magnetoresistance in manganite-titanate heterojunctions
• Theory of Mott insulator/band insulator heterostructure
• Dynamical mean field theory for transition temperature and optics of CMR manganites
• Implications of the Low-Temperature Instability of Dynamical Mean Theory for Double Exchange Systems

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