Metallic interface at the boundary between band and Mott insulators

Abstract

Motivated by experiments on atomically smooth layers of LaTiO${}_3$, a Mott insulator, sandwiched between layers of SrTiO${}_3$, a band insulator, a simple model for such heterostructures is studied using quasi one-dimensional lattices and the Lanczos method. Taking both the local and long-range Coulomb interactions into account, and computing the layer dependent local density of states, a metallic state was found at the interface whose extent strongly depends on the dielectric constant of the material. We also observed that the antiferromagnetic correlations in the bulk Mott phase persist into the metallic region. Our conclusions are in excellent agreement with recently reported results for this model in the opposite limit of infinite dimensions, thus providing an alternative tool to study electronic reconstruction effects in heterostructures.

References in corpus (6)

• Correlated Electrons in High Temperature Superconductors
• Proximity effects in superconductor-ferromagnet heterostructures
• Odd Triplet Superconductivity and Related Phenomena in Superconductor-Ferromagnet Structures
• Spatial inhomogeneity and strong correlation physics: a dynamical mean field study of a model Mott-insulator/band-insulator heterostructure
• Theory of Mott insulator/band insulator heterostructure
• Interface ordering and phase competition in a model Mott-insulator--band-insulator heterostructure

Cited by in corpus (25)

• Oxide spintronics
• Two-dimensional superconductivity at a Mott-Insulator/Band-Insulator interface: LaTiO3/SrTiO3
• The metal-insulator transition and its relation to magnetic structure in (LaMnO3)2n/(SrMnO3)n superlattices
• Nonlinear Hall effect and multichannel conduction in LaTiO3/SrTiO3 superlattices
• Metal-insulator transition in $(LaMn{O}_3{)}_{2n}/(SrMn{O}_3{)}_n$ superlattices
• Kondo proximity effect: How does a metal penetrate into a Mott insulator?
• Optical Study of the Free Carrier Response of LaTiO3/SrTiO3 Superlattices
• Metallic phase in the two-dimensional ionic Hubbard model
• The Mott insulator LaTiO_3 in heterostructures with SrTiO_3 is metallic
• Nonequilibrium transport and optical properties of model metal--Mott-insulator--metal heterostructures
• Fractionally delta-doped oxide superlattices for higher carrier mobilities
• Magnetoresistance in an all-manganite heterostructure
• Enhanced two dimensional electron gas charge densities at III-III/I-V oxide heterostructure interfaces
• Quantum phases and topological properties of interacting fermions in one-dimensional superlattices
• Embedding approach for dynamical mean field theory of strongly correlated heterostructures
• Charge transfer in heterostructures of strongly correlated materials
• Aspects of metallic low-temperature transport in Mott-insulator/ band-insulator superlattices: optical conductivity and thermoelectricity
• Formation of orbital-selective electron states in LaTiO${}_3$/SrTiO${}_3$ superlattices
• Electron gas at the interface between two antiferromagnetic insulating manganites
• Density of States and Magnetic Correlations at a Metal-Mott Insulator Interface
• Electronic and magnetic properties in strongly correlated heterostructures
• Excitations near the boundary between a metal and a Mott insulator
• Electrical permittivity driven metal-insulator transition in heterostructures of nonpolar Mott- and band insulators
• Spectral properties of heterostructures containing half-metallic ferromagnets in the presence of local many-body correlations
• Embedding Dynamical Mean-Field Theory for Superconductivity in Layered Materials and Heterostructures