Theory of Mott insulator/band insulator heterostructure

Abstract

A theory of heterostructures comprised of LaTiO${}_3$ (a Mott insulator) and SrTiO${}_3$ (a band insulator) is presented. The band structure of the Ti $d$% -electrons is treated with a nearest neighbor tight-binding approximation; the electric fields arising from the La${}^{3+}$/Sr${}^{2+}$ charge difference and the carriers are treated within a Hartree approximation; and the on-site interactions are treated by unrestricted Hartree-Fock. The phase diagram as a function of interaction strength and layer number is determined and predictions are made for optical conductivity experiments. A note worthy finding is that the edges of the heterostructure are generally metallic.

11 pages, 9 figures

References in corpus (3)

• Crystal and magnetic structure of LaTiO3 : evidence for non-degenerate $t_{2g}$-orbitals
• Orbital-Spin Structure and Coupling to Lattice in RTiO${}_3$ with R=La,Pr,Nd and Sm
• Presence of 3d Quadrupole Moment in LaTiO3 Studied by 47,49Ti NMR

Cited by in corpus (49)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Magnetic effects at the interface between nonmagnetic oxides
• Lattice relaxation, electronic screening, and spin and orbital phase diagram of LaTiO${}_3$/SrTiO${}_3$ superlattices
• Theory of the SrTiO3 Surface State Two-Dimensional Electron Gas
• Spatial inhomogeneity and strong correlation physics: a dynamical mean field study of a model Mott-insulator/band-insulator heterostructure
• Electron Doping of Cuprates via Interfaces with Manganites
• Lattice polarization effects on electron-gas charge densities in ionic superlattices
• 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
• Dynamical Mean Field Study of Model Double-Exchange Superlattices
• Modulation Doping near Mott-Insulator Heterojunctions
• Metallic interface at the boundary between band and Mott insulators
• Nonequilibrium transport and optical properties of model metal--Mott-insulator--metal heterostructures
• Strongly renormalized quasi-two-dimensional electron gas in a heterostructure with correlation effects
• Enhanced two dimensional electron gas charge densities at III-III/I-V oxide heterostructure interfaces
• Interface ordering and phase competition in a model Mott-insulator--band-insulator heterostructure
• Embedding approach for dynamical mean field theory of strongly correlated heterostructures
• Electron-Hole Liquids in Transition Metal Oxide Heterostructures
• Optical probe of electrostatic doping in an n-type Mott insulator
• Electronic Interface Reconstruction at Polar-Nonpolar Mott Insulator Heterojunctions
• Charge transfer in heterostructures of strongly correlated materials
• Ab-initio Low-Energy Model of Transition-Metal-Oxide Heterostructure LaAlO3/SrTiO3
• Mott p-n Junctions in layered materials
• Aspects of metallic low-temperature transport in Mott-insulator/ band-insulator superlattices: optical conductivity and thermoelectricity
• Electronic and Magnetic Reconstructions in Manganite Superlattices
• Benchmarking a semiclassical impurity solver for dynamical-mean-field theory: self-energies and magnetic transitions of the single-orbital Hubbard model
• Interfacial Magnetism in Manganite Superlattices
• Electron gas at the interface between two antiferromagnetic insulating manganites
• Surface effects in doping a Mott insulator
• Density of States and Magnetic Correlations at a Metal-Mott Insulator Interface
• Designing ferromagnetism in vanadium-oxide based superlattices
• Giant magnetoelectric effect in pure manganite-manganite heterostructures
• Electronic and magnetic properties of the ionic Hubbard model on the striped triangular lattice at 3/4 filling
• Electronic and magnetic properties in strongly correlated heterostructures
• Competition between reduced delocalization and charge transfer effects for a two-band Hubbard model
• Interlayer Hopping between Surface Mott Insulator and Bulk Band Insulator in layered 1T-TaS_{2}
• Electrical permittivity driven metal-insulator transition in heterostructures of nonpolar Mott- and band insulators
• Thermoelectric properties of a strongly correlated layer
• A comparative DMFT study of the eg-orbital Hubbard model in thin films
• Systematic Control of Carrier Doping without Disorder at Interface of Oxide Heterostructures
• Spectral properties of heterostructures containing half-metallic ferromagnets in the presence of local many-body correlations
• Quasi-particle propagation across semiconductor-Mott insulator interfaces
• Embedding Dynamical Mean-Field Theory for Superconductivity in Layered Materials and Heterostructures
• The effect of Coulomb interaction at ferromagnetic-paramagnetic metallic perovskite junctions
• Quantum Phase transition in the two dimensional ionic-Hubbard model
• Surface magnetic phase transition of the double-exchange ferromagnet: Schwinger-boson mean-field study
• Electronic reconstruction in correlated electron heterostructures
• Interplay of metamagnetic and structural transitions in Ca${}_{2-x}$Sr${}_x$RuO${}_4$