Competition between covalent bonding and charge transfer at complex-oxide interfaces

Abstract

Here we study the electronic properties of cuprate/manganite interfaces. By means of atomic resolution electron microscopy and spectroscopy, we produce a subnanometer scale map of the transition metal oxidation state profile across the interface between the high $T_c$ superconductor YBa${}_2$Cu${}_3$O${}_{7-\delta }$ and the colossal magnetoresistance compound (La,Ca)MnO${}_3$. A net transfer of electrons from manganite to cuprate with a peculiar non-monotonic charge profile is observed. Model calculations rationalize the profile in terms of the competition between standard charge transfer tendencies (due to band mismatch), strong chemical bonding effects across the interface, and Cu substitution into the Mn lattice, with different characteristic length scales.

11+7 pages, 3+2 figures

References in corpus (16)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Complexity in Strongly Correlated Electronic Systems
• Magnetic effects at the interface between nonmagnetic oxides
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• Polarity-induced oxygen vacancies at LaAlO3|SrTiO3 interfaces
• First-principles modeling of electrostatically doped perovskite systems
• Electron Doping of Cuprates via Interfaces with Manganites
• Suppressed magnetization in La${}_{0.7}$Ca${}_{0.3}$MnO${}_3$/YBa${}_2$Cu${}_3$O${}_{7-\delta }$ superlattices
• Superconductivity depression in ultrathin YBa2Cu3O7-x layers in La0.7Ca0.3MnO3 /YBa2Cu3O7-x superlattices
• Unconventional proximity effect and inverse spin-switch behavior in a model manganite-cuprate-manganite trilayer system
• Magnetic interaction at an interface between manganite and other transition metal oxides
• Electron-lattice coupling and partial nesting as the origin of Fermi-Arcs in manganites
• Effect of Interface Induced Exchange Fields on Cuprate-Manganite Spin Switches
• Equilibrium Properties of Double-Screened-Dipole-Barrier SINIS Josephson Junctions
• Direct measurement of charge transfer phenomena at ferromagnetic/superconducting oxide interfaces

Cited by in corpus (10)

• Band alignment and charge transfer in complex oxide interfaces
• Materials Structure, Properties and Dynamics through Scanning Transmission Electron Microscopy
• X-ray absorption study of the ferromagnetic Cu moment at the $\mathbf{YB}{\mathbf{a}}_2\mathbf{C}{\mathbf{u}}_3{\mathbf{O}}_7/\mathbf{L}{\mathbf{a}}_{2/3}\mathbf{C}{\mathbf{a}}_{1/3}\mathbf{Mn}{\mathbf{O}}_3$ interface and the variation of its exchange interaction with the Mn moment
• Controlling the strength of ferromagnetic order in YBa${}_2$Cu${}_3$O${}_7$/La${}_{2/3}$Ca${}_{1/3}$MnO${}_3$ multilayers
• X-ray absorption spectroscopy study of the electronic and magnetic proximity effects in YBa${}_2$Cu${}_3$O${}_7$/La${}_{2/3}$Ca${}_{1/3}$MnO${}_3$ and La${}_{2-x}$Sr${}_x$CuO${}_4$/La${}_{2/3}$Ca${}_{1/3}$MnO${}_3$ multilayers
• Selective interlayer ferromagnetic coupling between the Cu spins in YBa${}_2$ Cu${}_3$ O${}_{7-x}$ grown on top of La${}_{0.7}$ Ca${}_{0.3}$ MnO${}_3$
• Superconductor to Mott insulator transition in YBa${}_2$Cu${}_3$O${}_7$/LaCaMnO${}_3$ heterostructures
• Properties of La${}_{0.7}$Ca${}_{0.3}$MnO${}_3$ Under Extreme Tensile Strain
• Proximity driven commensurate pinning in YBa2Cu3O7 through all-oxide magnetic nanostructures
• Novel Cu-based dz2 order at a YBa2Cu3O7/ manganite interface