Hund bands in spectra of multiorbital systems

Abstract

Spectroscopy experiments are routinely used to characterize the behavior of strongly correlated systems. An in-depth understanding of the different spectral features is thus essential. Here, we show that the spectrum of the multiorbital Hubbard model exhibits unique Hund \ms{bands} that occur at energies given only by the Hund coupling $J_{\mathrm{H}}$, as distinct from the Hubbard satellites following the interaction $U$. We focus on experimentally relevant single-particle and optical spectra that we calculate for a model related to iron chalcogenide ladders. The calculations are performed via the density-matrix renormalization group and Lanczos methods. The generality of the implications is verified by considering a generic multiorbital model within dynamical mean-field theory.

References in corpus (64)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• The density-matrix renormalization group
• Correlated Electrons in High Temperature Superconductors
• A Common Thread: the pairing interaction for the unconventional superconductors
• Strong electronic correlations from Hund's coupling
• Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides
• Coherence-incoherence crossover in the normal state of iron-oxypnictides and importance of the Hund's rule coupling
• Dynamical density-matrix renormalization-group method
• Janus-faced influence of the Hund's rule coupling in strongly correlated materials
• Orbital-selective Mott transitions in the degenerate Hubbard model
• Energy resolution and discretization artefacts in the numerical renormalization group
• Orbital selective Mott transition in multi-band systems: slave-spin representation and dynamical mean-field theory
• Density matrix renormalization group algorithms with a single center site
• Mimicking cuprates: large orbital polarization in a metallic square-planar nickelate
• Role of the orbital degree of freedom in iron-based superconductors
• High-resolution photoemission on Sr2RuO4 reveals correlation-enhanced effective spin-orbit coupling and dominantly local self-energies
• Ground State and Finite Temperature Lanczos Methods
• Spectral function of the one-dimensional Hubbard model away from half filling
• DMFT+NRG study of spin-orbital separation in a three-band Hund's metal
• Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2Se3
• Spectral Functions with the Density Matrix Renormalization Group: Krylov-space Approach for Correction Vectors
• Hallmarks of Hund's coupling in the Mott insulator Ca${}_2$RuO${}_4$
• The Density Matrix Renormalization Group for Strongly Correlated Electron Systems: A Generic Implementation
• Fork Tensor Product States - Efficient Three Orbital Real Time DMFT Solver
• Formation of Hubbard-like bands as a fingerprint of strong electron-electron interactions in FeSe
• On the Electron Pairing Mechanism of Copper-Oxide High Temperature Superconductivity
• Prediction of Orbital Ordering in Single-Layered Ruthenates
• Hundness versus Mottness in a three-band Hubbard-Hund model: On the origin of strong correlations in Hund metals
• Optical Response of Sr${}_2$RuO${}_4$ Reveals Universal Fermi-liquid Scaling and Quasiparticles Beyond Landau Theory
• Determination of Hund's coupling in 5d Oxides using Resonant Inelastic X-ray Scattering
• Block magnetic excitations in the orbitally selective Mott insulator BaFe2Se3
• Calculated Exchange Interactions and Sensitivity of Ni Two-Hole Spin State to Hund's Coupling in Doped NdNiO2
• Superconductivity in nickel based 112 systems
• Exotic magnetic order in the orbital-selective Mott regime of multiorbital systems
• Dynamical density-density correlations in one-dimensional Mott insulators
• Electronic correlations and Hund's coupling effects in SrMoO${}_3$ revealed by photoemission spectroscopy
• Orbital differentiation in Hund metals
• Observation of spin-orbit excitations and Hund's multiplets in Ca${}_2$RuO${}_4$
• Spin dynamics of the block orbital-selective Mott phase
• Ultrafast coupled charge and spin dynamics in strongly correlated NiO
• Sr${}_2$MoO${}_4$ and Sr${}_2$RuO${}_4$: Disentangling the Roles of Hund's and van Hove Physics
• Optical conductivity of iron-based superconductors
• Spectral properties of transition metal pnictides and chalcogenides: angle-resolved photoemission spectroscopy and dynamical mean field theory
• Novel Magnetic Block States in Low-Dimensional Iron-Based Superconductors
• Fingerprints of an Exotic Orbital-Selective Mott Phase in the Block Magnetic State of BaFe${}_2$Se${}_3$ Ladders
• Interaction-resistant metals in multicomponent Fermi systems
• Hund's coupling driven photo-carrier relaxation in the two-band Mott insulator
• Quantum phase transition between orbital-selective Mott states in Hund's metals
• Orbitally selective breakdown of Fermi liquid quasiparticles in Ca${}_{1.8}$Sr${}_{0.2}$RuO${}_4$
• Orbital-selective Mott transitions in a doped two-band Hubbard model with crystal field splitting
• Hund excitations and the efficiency of Mott solar cells
• Spin-incoherent behavior in the ground state of strongly correlated systems
• Emergent low-energy bound states in the two-orbital Hubbard model
• Block orbital-selective Mott insulators: a spin excitation analysis
• Uncovering Non-Fermi-Liquid Behavior in Hund Metals: Conformal Field Theory Analysis of an SU(2)$\times$SU(3) Spin-Orbital Kondo Model
• Robust block magnetism in the spin ladder compound BaFe${}_2$Se${}_3$ under hydrostatic pressure
• Emergence of Quasiparticles in a Doped Mott Insulator
• State-of-the-art techniques for calculating spectral functions in models for correlated materials
• Quantum magnetism of iron-based ladders: Blocks, spirals, and spin flux
• Doublon-holon excitations split by Hund's rule coupling within the orbital-selective Mott phase
• In-gap band in the one-dimensional two-orbital Kanamori-Hubbard model with inter-orbital Coulomb interaction
• Renormalized dispersing multiplets in the spectrum of nearly Mott localized systems
• Novel subbands in the doped two-orbital Kanamori-Hubbard model
• Influence of multiplet structure on photoemission spectra of spin-orbit driven Mott insulators: application to $\mathbf{S}{\mathbf{r}}_2\mathbf{Ir}{\mathbf{O}}_4$

Cited by in corpus (7)

• Spontaneous layer selective Mott phase in the bilayer Hubbard model
• Dispersion kinks from electronic correlations in an unconventional iron-based superconductor
• Low-energy interband Kondo bound states in orbital-selective Mott phases
• Magnon damping and mode softening in quantum double-exchange ferromagnets
• Observation of Two Cascading Screening Processes in an Iron-based Superconductor
• Unconventional correlated metallic behavior due to interorbital Coulomb interaction
• Layer controlled orbital selective Mott transition in monolayer nickelate