Engineering Correlation Effects via Artificially Designed Oxide Superlattices

Abstract

Ab initio calculations are used to predict that a superlattice composed of layers of LaTiO3 and LaNiO3 alternating along the [001] direction is a S=1 Mott insulator with large magnetic moments on the Ni sites, negligible moments on the Ti sites and a charge transfer gap set by the energy difference between Ni d and Ti d states, distinct from conventional Mott insulators. Correlation effects are enhanced on the Ni sites via filling the oxygen p states and reducing the Ni-O-Ni bond angle. Small hole (electron) doping of the superlattice leads to a two-dimensional single-band situation with holes (electrons) residing on Ni dx2-y2 (Ti dxy) orbital and coupled to antiferromagnetically correlated spins in the NiO2 layer.

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References in corpus (9)

• Magnetic effects at the interface between nonmagnetic oxides
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• Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
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• Strain-induced insulator state in La_0.7Sr_0.3CoO_3
• Quantum many-body interactions in digital oxide superlattices
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• Metal-insulator transition and orbital reconstruction in Mott quantum wells of NdNiO${}_3$
• Charge transfer, confinement, and ferromagnetism in LaMnO${}_3$/LaNiO${}_3$ (001)-superlattice

Cited by in corpus (28)

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• Electronic reconstruction at the isopolar LaTiO3/LaFeO3 interface: An x-ray photoemission and density functional theory study
• Similarities and differences between nickelate and cuprate films grown on a SrTiO${}_3$ substrate
• Orbital Polarization in Strained LaNiO${}_3$: Structural Distortions and Correlation Effects
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• Confinement- and strain-induced enhancement of thermoelectric properties in LaNiO${}_3$/LaAlO${}_3(001)$ superlattices
• Orbital engineering in nickelate heterostructures driven by anisotropic oxygen hybridization rather than orbital energy levels
• Charge transfer across transition metal oxide interfaces: emergent conductance and new electronic structure
• Structural and metal-insulator transitions in rhenium based double perovskites via orbital ordering
• Antisite defects at oxide interfaces
• Advances in actinide thin films: synthesis, properties, and future directions
• Nickel-Titanium double perovskite: A three-dimensional spin-1 Heisenberg antiferromagnet
• Quantum Confinement Induced Metal-Insulator Transition in Strongly Correlated Quantum Wells of SrVO${}_3$ Superlattice
• Charge transfer and metallicity in LaNiO${}_3$/LaMnO${}_3$ superlattices
• Charge transfer in LaVO${}_3$/LaTiO${}_3$ multilayers: strain-controlled dimensionality of interface metallicity between two Mott insulators
• Band-Engineered LaFeO${}_3$-LaNiO${}_3$ Thin Film Interfaces for Electrocatalysis of Water
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