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.

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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