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 bands that occur at energies given only by the Hund coupling JH, 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.
| Original language | English |
|---|---|
| Article number | L081102 |
| Journal | Physical Review B |
| Volume | 108 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 15 2023 |
Funding
Acknowledgments. M.Ś. and J.H. acknowledge grant support by the Polish National Agency of Academic Exchange (NAWA) under Contract No. PPN/PPO/2018/1/00035 and by the National Science Centre (NCN), Poland, via Project No. 2019/35/B/ST3/01207. J.M. acknowledges support by the Slovenian Research Agency under Programs No. P1-0044, No. J1-2458, No. J1-2456, and No. J1-2463. G.A. was supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Science Center. E.D. was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. Some of the calculations have been carried out using resources provided by the Wroclaw Centre for Networking and Supercomputing .