Orbital-selective Mott-Hubbard transition in the two-band Hubbard model

Abstract

Recent advances in the field of quantum Monte Carlo simulations for impurity problems allow --within dynamical mean field theory-- for a more thorough investigation of the two-band Hubbard model with narrow/wide band and SU(2)-symmetric Hund's exchange. The nature of this transition has been controversial, and we establish that an orbital-selective Mott-Hubbard transition exists. Thereby, the wide band still shows metallic behavior after the narrow band became insulating -not a pseudogap as for an Ising Hund's exchange. The coexistence of two solutions with metallic wide band and insulating or metallic narrow band indicates, in general, first-order transitions.

4 pages, 3 figures; 2nd version as published in Phys. Rev. B (R); minor corrections, putting more emphasis on differences in spectra when comparing SU(2) and Ising Hund's exchange

References in corpus (19)

• Ab initio calculations of quasiparticle band structure in correlated systems: LDA++ approach
• First-principles Calculations of the Electronic Structure and Spectra of Strongly Correlated Systems: Dynamical Mean-field Theory
• Zero temperature metal-insulator transition in the infinite-dimensional Hubbard model
• Ferromagnetic spin fluctuation induced superconductivity in Sr_2RuO_4
• Orbital-selective Mott transitions in the degenerate Hubbard model
• Microscopic conditions favoring itinerant ferromagnetism: Hund's rule coupling and orbital degeneracy
• Integer filling metal insulator transitions in the degenerate Hubbard model
• Hund's coupling and the metal-insulator transition in the two-band Hubbard model
• The Finite Temperature Mott Transition in the Hubbard Model in Infinite Dimensions
• Kondo Effect in Single Quantum Dot Systems --- Study with Numerical Renormalization Group Method ---
• Spin, charge and orbital fluctuations in a multi-orbital Mott insulator
• Multi-Orbital Hubbard Model in Infinite Dimensions: Quantum Monte Carlo Calculation
• Single Mott Transition in Multi-Orbital Hubbard Model
• Mott transitions in correlated electron systems with orbital degrees of freedom
• A new numerical algorithm for the double-orbital Hubbard model -- Hund-coupled pairing symmetry in the doped case
• Spin-triplet s-wave local pairing induced by Hund's rule coupling
• A Quantum Monte Carlo Method and Its Applications to Multi-Orbital Hubbard Models
• Projective Quantum Monte Carlo Method for the Anderson Impurity Model and its Application to Dynamical Mean Field Theory
• Numerical Study for the Ground State of Multi-Orbital Hubbard Models

Cited by in corpus (58)

• Hybridization expansion impurity solver: General formulation and application to Kondo lattice and two-orbital models
• Turning a nickelate Fermi surface into a cuprate-like one through heterostructuring
• Correlation effects in two-dimensional topological insulators
• Orbital-selective Mott transitions: Heavy fermions and beyond
• Electronic structure of nickelates: From two-dimensional heterostructures to three-dimensional bulk materials
• Mott Transition in Multi-Orbital Models for Iron Pnictides
• Doped Mott insulator as the origin of heavy Fermion behavior in LiV2O4
• Orbital-ordering driven structural distortion in metallic SrCrO3
• Superconductivity and its mechanism in an ab initio model for electron-doped LaFeAsO
• Exact Diagonalization Dynamical Mean Field Theory for Multi-Band Materials: Effect of Coulomb correlations on the Fermi surface of Na_0.3CoO_2
• Self-consistent ladder D$\Gamma$A approach
• Quantum Monte Carlo study for multiorbital systems with preserved spin and orbital rotational symmetries
• Quantum phase transition in the two-band Hubbard model
• Preformed Excitons, Orbital Selectivity, and Charge-Density-Wave Order in 1T-TiSe_2
• Magnetic groundstates in a correlated two orbital Hubbard model
• Complete phase diagram for three-band Hubbard model with orbital degeneracy lifted by crystal field splitting
• Metal-insulator transition in the two-orbital Hubbard model at fractional band fillings: Self-energy functional approach
• Mott transition of fermionic mixtures with mass imbalance in optical lattices
• Emergence of a common energy scale close to the orbital-selective Mott transition
• Dynamical cluster approximation study of the anisotropic two-orbital Hubbard model
• A multi-orbital iterated perturbation theory for model Hamiltonians and real material-specific calculations of correlated systems
• Orbital-selective Mott transitions in a doped two-band Hubbard model with crystal field splitting
• Quantum phase transitions in the extended periodic Anderson model
• A General Mechanism for Orbital Selective Phase Transitions
• Non-Fermi-liquid phases in the two-band Hubbard model: Finite-temperature exact diagonalization study of Hund's rule coupling
• Effects of an Additional Conduction Band on Singlet-Antiferromagnet Competition in the Periodic Anderson Model
• Charge Density Waves on a Half-Filled Decorated Honeycomb Lattice
• Determinant Quantum Monte Carlo Study of the Orbitally Selective Mott Transition
• Tunable site- and orbital-selective Mott transition and quantum confinement effects in La${}_{0.5}$Ca${}_{0.5}$MnO${}_3$ nanoclusters
• Extended regime of coexisting metallic and insulating phases in a two-orbital electronic system
• Two-orbital Systems with Crystal Field Splitting and Interorbital Hopping
• Extended Metal-Insulator Crossover with Strong Antiferromagnetic Spin Correlation in Half-Filled 3D Hubbard Model
• Assessing the orbital selective Mott transition with variational wave functions
• Kondo screening and Magnetism at Interfaces
• Hybridisation in two-band Hubbard models with different bandwidths
• Effect of density of states peculiarities on Hund's metal behavior
• Hybridizing localized and itinerant electrons: a recipe for pseudogaps
• Density of States and Magnetic Correlations at a Metal-Mott Insulator Interface
• Can Orbital-Selective Néel Transitions Survive Strong Nonlocal Electronic Correlations?
• Doublon-holon excitations split by Hund's rule coupling within the orbital-selective Mott phase
• Orbital Selective Mott Transition Induced by Orbitals with Distinct Noninteracting Densities of States
• Mott-Hubbard transition in the mass-imbalanced Hubbard model
• Ionic Hubbard model on a triangular lattice for Na_0.5CoO_2, Rb_0.5CoO_2 and K_0.5CoO_2: Mean-field slave boson theory
• Reply to a Comment on ``Projective Quantum Monte Carlo Method for the Anderson Impurity Model and its Application to Dynamical Mean Field Theory''
• From d- to p-wave pairing in the t-t' Hubbard model at zero temperature
• Orbital Selective Phase Transition
• Effects of Strong Interactions in a Half Metallic Magnet: a Determinant Quantum Monte Carlo Study
• Development of an efficient impurity solver in dynamical mean field theory for multi-band systems: The iterative perturbation theory combined with the parquet equations
• Distinct Nature of Orbital Selective Mott Phases Dominated by the Low-energy Local Spin Fluctuations
• Finite f-Electron Bandwidth in a Heavy Fermion Model
• Magnetic and orbital correlations in a two-site molecule
• Anisotropic two-orbital Hubbard model: single-site versus cluster dynamical mean-field theory
• Slope-Reversed Mott Transition in Multiorbital Systems
• Mott transition, magnetic and orbital orders in the ground state of the two-band Hubbard model using variational slave-spin mean field formalism
• Interplay of mass imbalance and frustration in correlated band insulators
• Interplay of metamagnetic and structural transitions in Ca${}_{2-x}$Sr${}_x$RuO${}_4$
• Multi-orbital dynamical mean-field theory with a complex-time solver
• Quantitative determination of the orbital-selective Mott transition and quantum entanglement in the orbital-selective Mott phase