Continuum Double Exchange Model

Abstract

We present a continuum model for doped manganites which consist of two species of quantum spin 1/2 fermions interacting with classical spin fields. The phase structure at zero temperature turns out to be considerably rich: antiferromagnetic insulator, antiferromagnetic two band conducting, canted two band conducting, canted one band conducting and ferromagnetic one band conducting phases are identified, all of them being stable against phase separation. There are also regions in the phase diagram where phase separation occurs.

14 pages, LaTeX2e file, two eps included figures. Published version

References in corpus (3)

• Liquid-like spatial distribution of magnetic polarons revealed by neutron scattering in La{1-x}Ca{x}MnO3
• Phase Separation Induced by Orbital Degrees of Freedom in Models for Manganites with Jahn-Teller Phonons
• On the Theory of Magnets with Competing Double Exchange and Superexchange Interactions

Cited by in corpus (6)

• Systematic Low-Energy Effective Theory for Magnons and Charge Carriers in an Antiferromagnet
• Two-Hole Bound States from a Systematic Low-Energy Effective Field Theory for Magnons and Holes in an Antiferromagnet
• Magnetic Phases of Electron-Doped Manganites
• Spin Waves in Canted Phases: An Application to Doped Manganites
• Homogeneous versus Spiral Phases of Hole-doped Antiferromagnets: A Systematic Effective Field Theory Investigation
• Microscopic Model versus Systematic Low-Energy Effective Field Theory for a Doped Quantum Ferromagnet