Engineered Mott ground state in LaTiO${}_{3+\delta }$/LaNiO${}_3$ heterostructure

Abstract

In pursuit of creating cuprate-like electronic and orbital structures, artificial heterostructures based on LaNiO${}_3$ have inspired a wealth of exciting experimental and theoretical results. However, to date there is a very limited experimental understanding of the electronic and orbital states emerging after interfacial charge-transfer and their connections to the modified band structure at the interface. Towards this goal, we have synthesized a prototypical superlattice composed of correlated metal LaNiO${}_3$ and doped Mott insulator LaTiO${}_{3+\delta }$, and investigated its electronic structure by resonant X-ray absorption spectroscopy combined with X-ray photoemission spectroscopy, electrical transport and theory calculations. The heterostructure exhibits interfacial charge-transfer from Ti to Ni sites giving rise to an insulating ground state with orbital polarization and $e_{\text{g}}$ orbital band splitting. Our findings demonstrate how the control over charge at the interface can be effectively used to create exotic electronic, orbital and spin states.

arXiv comment4 figures

References in corpus (25)

• Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
• Metal-insulator transition in ultrathin LaNiO3 films
• Emergent properties hidden in plane view: Strong electronic correlations at oxide interfaces
• Turning a nickelate Fermi surface into a cuprate-like one through heterostructuring
• Orbital reflectometry
• Asymmetric orbital-lattice interactions in ultra-thin correlated oxide films
• Interfaces of correlated electron systems: Proposed mechanism for colossal electroresistance
• Orbital Physics in the Perovskite Ti Oxides
• Quantum confinement of Mott electrons in ultrathin LaNiO3/LaAlO3 superlattice
• Strain and composition dependence of the orbital polarization in nickelate superlattices
• Charge transfer and interfacial magnetism in (LaNiO3)n/(LaMnO3)2 superlattices
• Dynamical Mean Field Theory of Nickelate Superlattices
• Orbital control in strained ultra-thin LaNiO${}_3$/LaAlO${}_3$ superlattices
• Modifying the Electronic Orbitals of Nickelate Heterostructures Via Structural Distortions
• Engineering Correlation Effects via Artificially Designed Oxide Superlattices
• Electronic reconstruction at the isopolar LaTiO3/LaFeO3 interface: An x-ray photoemission and density functional theory study
• Onset of metallic behavior in strained (LaNiO3)n/(SrMnO3)2 superlattices
• Epitaxial growth of (111)-oriented LaAlO${}_3$/LaNiO${}_3$ ultra-thin superlattices
• Modulation Doping near Mott-Insulator Heterojunctions
• Nonequilibrium transport and optical properties of model metal--Mott-insulator--metal heterostructures
• Strain dependent transport properties of the quasi two-dimensional correlated metal, LaNiO${}_3$
• Suppression of rectification at metal-Mott-insulator interfaces
• Mott p-n Junctions in layered materials
• Metallic Conductance at the Interface of Tri-color Titanate Superlattices
• Spin Andreev-like reflection in metal-Mott insulator heterostructures

Cited by in corpus (25)

• Physics of ultrathin films and heterostructures of rare earth nickelates
• Charge and spin order dichotomy in NdNiO${}_2$ driven by SrTiO${}_3$ capping layer
• Band alignment and charge transfer in complex oxide interfaces
• Charge transfer driven emergent phenomena in oxide heterostructures
• Tailoring Materials for Mottronics: Excess Oxygen Doping of a Prototypical Mott Insulator
• Anomalous orbital structure in a spinel-perovskite interface $\gamma$-Al${}_2$O${}_3$/SrTiO${}_3$
• Probing Emergent Surface and Interfacial Properties in Complex Oxides via in situ X-ray Photoelectron Spectroscopy
• Orbital engineering in nickelate heterostructures driven by anisotropic oxygen hybridization rather than orbital energy levels
• Selective Interface Control of Order Parameters in Complex Oxides
• Decoupling carrier concentration and electron-phonon coupling in oxide heterostructures observed with resonant inelastic x-ray scattering
• Electron-polaron dichotomy of charge carriers in perovskite oxides
• Antisite defects at oxide interfaces
• Defect-induced orbital polarization and collapse of orbital order in doped vanadium perovskites
• Superconductor to Mott insulator transition in YBa${}_2$Cu${}_3$O${}_7$/LaCaMnO${}_3$ heterostructures
• Emergent c-axis magnetic helix in manganite-nickelate superlattices
• Inverted orbital polarization in strained correlated oxide films
• Engineering charge ordering into multiferroicity
• Large Orbital Magnetic Moment and Strong Perpendicular Magnetic Anisotropy in Heavily Intercalated Fe${}_x$TiS${}_2$
• Visualizing quantum phenomena at complex oxide interfaces: an atomic view from scanning transmission electron microscopy
• PERSPECTIVE: Emergent phases in rare earth nickelate heterostructures
• Effect of oxygen vacancy on structural, electronic and magnetic properties of La-based oxide interfaces
• Coherent epitaxy of trilayer nickelate (Nd0.8Sr0.2)4Ni3O10 films by high-pressure magnetron sputtering
• Oxygen sublattice disorder and valence state modulation in infinite-layer nickelate superlattices
• Emergence of interfacial magnetism in strongly-correlated nickelate-titanate superlattices
• Magnetoresistance in Metallic Ferroelectrics