Electronic Phase Separation in Manganite/Insulator Interfaces

Abstract

By using a realist microscopic model, we study the electric and magnetic properties of the interface between a half metallic manganite and an insulator. We find that the lack of carriers at the interface debilitates the double exchange mechanism, weakening the ferromagnetic coupling between the Mn ions. In this situation the ferromagnetic order of the Mn spins near the interface is unstable against antiferromagnetic CE correlations, and a separation between ferromagnetic/metallic and antiferromagnetic/insulator phases at the interfaces can occur. We obtain that the insertion of extra layers of undoped manganite at the interface introduces extra carriers which reinforce the double exchange mechanism and suppress antiferromagnetic instabilities.

8 pages, 7 figures included

References in corpus (4)

• Dynamical Mean Field Study of Model Double-Exchange Superlattices
• Solitonic Phase in Manganites
• Phase Diagram and Incommensurate Phases in Undoped Manganites
• Phase Diagram of Half Doped Manganites

Cited by in corpus (20)

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• Evidence of orbital reconstruction at interfaces in La0.67Sr0.33MnO3 films
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• Strain-driven elastic and orbital-ordering effects on thickness-dependent properties of manganite thin films
• Competing misfit relaxation mechanisms in epitaxial correlated oxides
• Metal-insulator transition in $(LaMn{O}_3{)}_{2n}/(SrMn{O}_3{)}_n$ superlattices
• Nanoscale Suppression of Magnetization at Atomically Assembled Manganite Interfaces
• Magnetoelectric coupling at the interface of BiFeO3/La0.7Sr0.3MnO3 multilayers
• Microscopic model for the ferroelectric field effect in oxide heterostructures
• Effect of strain on the orbital and magnetic ordering of manganite thin films and their interface with an insulator
• Magnetoresistance in an all-manganite heterostructure
• Electronic and Magnetic Properties of ${\mathrm{RMnO}}_3/{\mathrm{AMnO}}_3$ Heterostructures
• Measuring magnetic profiles at manganite surfaces with monolayer resolution
• Electronic and Magnetic Reconstructions in Manganite Superlattices
• Charge and orbital order in transition metal oxides
• Electron gas at the interface between two antiferromagnetic insulating manganites
• Interface controlled electronic variations in correlated heterostructures
• Spin-orbit effects surfacing on manganites
• Interfacial Phase Competition Induced Kondo-like Effect in Manganite-insulator Composites
• The effect of Coulomb interaction at ferromagnetic-paramagnetic metallic perovskite junctions