Perspective: Strongly correlated and topological states in [111] grown transition metal oxide thin films and heterostructures

Abstract

We highlight recent advances in the theory, materials fabrication, and experimental characterization of strongly correlated and topological states in [111] oriented transition metal oxide thin films and heterostructures, which are notoriously difficult to realize compared to their [001] oriented counterparts. We focus on two classes of complex oxides, with the chemical formula ABO3 and A2B2O7, where the B sites are occupied by an open-shell transition metal ion with a local moment, and the A sites are typically a rare earth. The [111] oriented quasi-two-dimensional lattices derived from these parent compound lattices can exhibit peculiar geometries and symmetries, namely, a buckled honeycomb lattice, as well as kagome and triangular lattices. These lattice motifs form the basis for emergent strongly correlated and topological states expressed in exotic magnetism, various forms of orbital ordering, topological insulators, topological semimetals, quantum anomalous Hall insulators, and quantum spin liquids. For transition metal ions with high atomic number, spin-orbit coupling plays a significant role and may give rise to additional topological features in the electronic band structure and in the spectrum of magnetic excitations. We conclude the Perspective by articulating open challenges and opportunities in this actively developing field.

References in corpus (98)

• Topological Insulators
• Topological insulators and superconductors
• Magic-angle graphene superlattices: a new platform for unconventional superconductivity
• Quantum Spin Hall Effect in Graphene
• Fault-tolerant quantum computation by anyons
• Non-Abelian Anyons and Topological Quantum Computation
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Topological Insulators in Three Dimensions
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Classification of topological insulators and superconductors in three spatial dimensions
• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Topological insulators and superconductors: ten-fold way and dimensional hierarchy
• Topological Crystalline Insulators
• Non-abelian statistics of half-quantum vortices in p-wave superconductors
• Dirac semimetal in three dimensions
• Magnetic effects at the interface between nonmagnetic oxides
• Topological superconductors: a review
• Topological Crystalline Insulators in the SnTe Material Class
• Magnetic Pyrochlore Oxides
• Resonant Inelastic X-ray Scattering Studies of Elementary Excitations
• Correlated quantum phenomena in the strong spin-orbit regime
• Fractional quantum Hall states at zero magnetic field
• Mott physics and band topology in materials with strong spin-orbit interaction
• Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface
• Quantum Hall effects in a Weyl Semi-Metal: possible application in pyrochlore Iridates
• Coexistence of Magnetic Order and Two-dimensional Superconductivity at LaAlO${}_3$/SrTiO${}_3$ Interfaces
• The space group classification of topological band insulators
• Topological classification of crystalline insulators through band structure combinatorics
• Spin waves and revised crystal structure of honeycomb iridate Na2IrO3
• Interface engineering of quantum Hall effects in digital transition metal oxide heterostructures
• Topological Insulators and Nematic Phases from Spontaneous Symmetry Breaking in 2D Fermi Systems with a Quadratic Band Crossing
• Topological and magnetic phases of interacting electrons in the pyrochlore iridates
• Nearly flat band with Chern number C=2 on the dice lattice
• Topological Kondo Insulators
• Emergent properties hidden in plane view: Strong electronic correlations at oxide interfaces
• Topological insulators and metal-insulator transition in the pyrochlore iridates
• Monte Carlo study of an unconventional superconducting phase in Ir-oxide J_{eff}=1/2 Mott insulators induced by carrier doping
• Weyl magnons in breathing pyrochlore antiferromagnets
• Doping a spin-orbit Mott Insulator: Topological Superconductivity from the Kitaev-Heisenberg Model and possible application to (Na2/Li2)IrO3
• Topological insulators from complex orbital order in transition-metal oxides heterostructures
• Bulk Dirac points in distorted spinels
• Asymmetric orbital-lattice interactions in ultra-thin correlated oxide films
• High mobility conduction at (110) and (111) LaAlO3/SrTiO3 interfaces
• Recent progress on correlated electron systems with strong spin-orbit coupling
• Tuning phase transition between quantum spin Hall and ordinary insulating phases
• Topology of nonsymmorphic crystalline insulators and superconductors
• Topological non-symmorphic crystalline insulators
• Three-dimensional Topological Insulators on the Pyrochlore Lattice
• Possible interaction driven topological phases in (111) bilayers of LaNiO3
• A parity-breaking electronic nematic phase transition in the spin-orbit coupled metal Cd${}_2$Re${}_2$O${}_7$
• Continuous Transition between Antiferromagnetic Insulator and Paramagnetic Metal in the Pyrochlore Iridate Eu2Ir2O7
• Competing Exotic Topological Insulator Phases in Transition Metal Oxides on the Pyrochlore Lattice with Distortion
• Fractionalized Topological Insulators
• Metal-insulator transition and topological properties of pyrochlore iridates
• Magnetic field-induced insulator-semimetal transition in a pyrochlore Nd2Ir2O7
• Emergent topological phenomena in thin films of pyrochlore iridates
• Odd-parity magnetoresistance in pyrochlore iridate thin films with broken time-reversal symmetry
• Mixing of $t_{2g}$-$e_g$ orbitals in 4d and 5d transition metal oxides
• Electronic structure of (LaNiO${}_3$)${}_2$/(LaAlO${}_3$)${}_N$ heterostructures grown along [111]
• Quantum-Matter Heterostructures
• Topological states in pyrochlore iridates: long-range anisotropy strongly competing with spin-orbit interaction
• Correlation effects in (111) bilayers of perovskite transition-metal oxides
• Doped Mott Insulators in (111) Bilayers of Perovskite Transition-Metal Oxides with a Strong Spin-Orbit Coupling
• Electrically Tunable Topological State in [111] Perovskite Materials with Antiferromagnetic Exchange Field
• Confinement-driven transitions between topological and Mott phases in (LaNiO3)${}_N$/(LaAlO3)${}_M$(111) superlattices
• Topological Magnon Bands and Unconventional Superconductivity in Pyrochlore Iridate Thin Films
• Polar catastrophe in ultra-thin limit: A case of rare-earth perovskite LaNiO3
• Fractional Topological Insulators -- a Pedagogical Review
• Topological phases in layered pyrochlore oxide thin films along the [111] direction
• Epitaxial growth of (111)-oriented LaAlO${}_3$/LaNiO${}_3$ ultra-thin superlattices
• Interaction-induced quantum anomalous Hall phase in (111) bilayer of LaCoO${}_3$
• Mott Electrons in an Artificial Graphenelike Crystal of Rare-Earth Nickelate
• Topological order in a correlated three-dimensional topological insulator
• Lattice distortion effects on topological phases in (LaNiO${}_3$)${}_2$/(LaAlO${}_3$)${}_N$ heterostructures grown along the [111] direction
• Electron interactions, spin-orbit coupling, intersite correlations in pyrochlore iridates
• Epitaxial thin films of pyrochlore iridate Bi_{2+x}Ir_{2-y}O_{7-delta}: structure, defects and transport properties
• Computational study of (111) epitaxially strained ferroelectric perovskites BaTiO3 and PbTiO3
• Unconventional anomalous Hall effect from antiferromagnetic domain walls of Nd2Ir2O7 thin films
• Momentum-resolved electronic structure at a buried interface from soft x-ray standing-wave angle-resolved photoemission
• Ab initio study of $Z_2$ topological phases in perovskite (111) $({\text{SrTiO}}_3{)}_7/({\text{SrIrO}}_3{)}_2$ and $({\text{KTaO}}_3{)}_7/({\text{KPtO}}_3{)}_2$ multilayers
• All-in-all-out magnetic domain wall conduction in pyrochlore iridate heterointerface
• All-in-all-out magnetic domain size in pyrochlore iridate thin films as probed by local magnetotransport
• Electron-Hole Liquids in Transition Metal Oxide Heterostructures
• Spontaneous Hall Effect enhanced by local Ir moments in epitaxial Pr${}_2$Ir${}_2$O${}_7$ thin films
• Correlation effects in pyrochlore iridate thin films grown along the $[111]$ direction
• Transition-Metal Oxide (111) bilayers
• Geometrical lattice engineering of complex oxide heterostructures: a designer approach to emergent quantum states
• Theory of Multifarious Quantum Phases and Large Anomalous Hall effect in Pyrochlore Iridate Thin Films
• Reconstruction-Stabilized Epitaxy of LaCoO3/SrTiO3(111) Heterostructures by Pulsed Laser Deposition
• Topological Phases in Oxide Heterostructures with Light and Heavy Transition Metal Ions
• Emergent magnetic state in (111)-oriented quasi-two-dimensional spinel oxides
• Confinement-driven electronic and topological phases in corundum-derived $3d$-oxide honeycomb lattices
• Electronic structure of a graphene-like artificial crystal of $NdNi{O}_3$
• Possible Scale Invariant Linear Magnetoresistance in Pyrochlore Iridates Bi${}_2$Ir${}_2$O${}_7$
• Possible high temperature odd parity superconductivity in LaNi${}_{7/8}$Co${}_{1/8}$O${}_3$ (111) bilayers
• First Principles Prediction of Topological Phases in Thin Films of Pyrochlore Iridates

Cited by in corpus (14)

• A magnetic Weyl semimetallic phase in thin films of Eu${}_2$Ir${}_2$O${}_7$
• Tunable spin and orbital Edelstein effect at (111) LaAlO${}_3$/SrTiO${}_3$ interface
• Inversion-symmetry engineering in sub-unit-cell-layered oxide thin films
• Lattice dynamics and magnetic exchange interactions in GeCo2O4, a spinel with S = 1/2 pyrochlore lattice
• Control of the metal-insulator transition in NdNiO${}_3$ thin films through the interplay between structural and electronic properties
• Flexomagnetoelectric effect in Sr2IrO4 thin films
• Epitaxial stabilization of (111)-oriented frustrated quantum pyrochlore thin films
• Strain-induced topological phase transition at (111) SrTiO${}_3$-based heterostructures
• Magnetism and berry phase manipulation in an emergent structure of perovskite ruthenate by (111) strain engineering
• Persistent half-metallic ferromagnetism in a (111)-oriented manganite superlattice
• Orientation-dependent stabilization of MgCr${}_2$O${}_4$ spinel thin films
• Weak antilocalization and localization in Eu${}_2$Ir${}_2$O${}_7$ (111) thin films by reactive solid phase epitaxy
• Extreme disorder in crystalline perovskite oxide: a new paradigm in quantum materials research
• Emergent topological states via digital (001) oxide superlattices