Charge transport and magnetization profile at the interface between a correlated metal and an antiferromagnetic insulator

Abstract

A combination of spectroscopic probes was used to develop a detailed experimental description of the transport and magnetic properties of superlattices composed of the paramagnetic metal CaRuO${}_3$ and the antiferromagnetic insulator CaMnO${}_3$. The charge carrier density and Ru valence state in the superlattices are not significantly different from those of bulk CaRuO${}_3$. The small charge transfer across the interface implied by these observations confirms predictions derived from density functional calculations. However, a ferromagnetic polarization due to canted Mn spins penetrates 3-4 unit cells into CaMnO${}_3$, far exceeding the corresponding predictions. The discrepancy may indicate the formation of magnetic polarons at the interface.

4 pages, 3 figures

References in corpus (10)

• Why Some Interfaces Cannot be Sharp
• Evidence of orbital reconstruction at interfaces in La0.67Sr0.33MnO3 films
• Mobility of the Doped Holes and the Antiferromagnetic Correlations in Underdoped High-T_c Cuprates
• Non-Fermi liquid behavior and scaling of low frequency suppression in optical conductivity spectra of CaRuO${}_3$
• Possible field-tuned SIT in high-Tc superconductors: implications for pairing at high magnetic fields
• Inhomogeneous magnetism in La-doped CaMnO3. (I) Nanometric-scale spin clusters and long-range spin canting
• Kondo proximity effect: How does a metal penetrate into a Mott insulator?
• Impurity Conduction and Magnetic Polarons in Antiferromagnetic Oxides
• Suppressed Magnetization at the Surfaces and Interfaces of Ferromagnetic Metallic Manganites
• Polaron Transport in the Paramagnetic Phase of Electron-Doped Manganites

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• Charge transfer and interfacial magnetism in (LaNiO3)n/(LaMnO3)2 superlattices
• Interfacial Ferromagnetism in LaNiO3/CaMnO3 Superlattices
• Design of a Mott Multiferroic from a Non-Magnetic Polar Metal
• Magnetic interactions at the nanoscale in trilayer titanates LaTiO${}_3$/SrTiO${}_3$/YTiO${}_3$
• Relationship between charge redistribution and ferromagnetism at the heterointerface between perovskite oxides LaNiO${}_3$ and LaMnO${}_3$
• Interfacial Magnetism in Complex Oxide Heterostructures Probed by Neutrons and X-rays
• Termination-dependent Electronic and Magnetic Properties of Ultrathin SrRuO${}_3$ (111) Film on SrTiO${}_3$
• Tuning Interfacial Ferromagnetism in LaNiO${}_3$/CaMnO${}_3$ Superlattices by Stabilizing Non-Equilibrium Crystal Symmetry
• Density of States and Magnetic Correlations at a Metal-Mott Insulator Interface
• Electric field control of anomalous Hall effect in CaIrO${}_3$/CaMnO${}_3$ heterostructure
• Magnetic and metal-insulator transitions in coupled spin-fermion systems
• Near-room-temperature ferrimagnetism and half-metallicity in disordered Ca1.5La0.5MnRuO6
• Dielectric Screening and Electric Field Control of Ferromagnetism at the CaMnO${}_3$/CaRuO${}_3$ Interface