Hund bands in spectra of multiorbital systems

Środa, Maksymilian; Mravlje, J.; Alvarez, Gonzalo; Dagotto, Elbio R.; Herbrych, Jacek

doi:10.1103/physrevb.108.l081102

Hund bands in spectra of multiorbital systems

Journal Article · Thu Aug 03 04:00:00 EDT 2023 · Physical Review. B

DOI:https://doi.org/10.1103/physrevb.108.l081102· OSTI ID:1997702

^[1]; Mravlje, J. ^[2]; ^[3]; Dagotto, Elbio R. ^[4]; Herbrych, Jacek ^[1]

Wroclaw Univ. of Science and Technology (Poland)
Jozef Stefan Inst. (IJS), Ljubljana (Slovenia)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

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 J_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. Finally, the generality of the implications is verified by considering a generic multiorbital model within dynamical mean-field theory.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); National Quantum Information Science (QIS) Research Centers (United States). The Quantum Science Center (QSC)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); Polish National Agency of Academic Exchange (NAWA); Polish National Science Centre (NCN)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1997702

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 8 Vol. 108; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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