Charge-ordered ferromagnetic phase in manganites

Abstract

A mechanism for charge-ordered ferromagnetic phase in manganites is proposed. The mechanism is based on the double exchange in the presence of diagonal disorder. It is modeled by a combination of the Ising double-exchange and the Falicov-Kimball model. Within the dynamical mean-field theory the charge and spin correlation function are explicitely calculated. It is shown that the system exhibits two successive phase transitions. The first one is the ferromagnetic phase transition, and the second one is a charge ordering. As a result a charge-ordered ferromagnetic phase is stabilized at low temperature.

To appear in Phys. Rev. B

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Cited by in corpus (9)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Doping change and distortion effect on double-exchange ferromagnetism
• Charge Order in the Falicov-Kimball Model
• Impact of magnetic dopants on magnetic and topological phases in magnetic topological insulators
• Spin dynamics in paramagnetic diluted magnetic semiconductors
• Metallic ferromagnetism-insulating charge order transition in doped manganites
• Mott transitions in three-component Falicov-Kimball model
• Electron structure of the Falicov-Kimball model with a magnetic field
• Phase Separation and Charge-Ordered Phases of the d = 3 Falicov-Kimball Model at T>0: Temperature-Density-Chemical Potential Global Phase Diagram from Renormalization-Group Theory