Constraints on the two-dimensional pseudospin-21 Mott insulator description of Sr2IrO4
SCIE
SCOPUS
- Title
- Constraints on the two-dimensional pseudospin-21 Mott insulator description of Sr2IrO4
- Authors
- Zwartsenberg, B.; Day, R. P.; Razzoli, E.; Michiardi, M.; Na, M. X.; Zhang, G.; Denlinger, J. D.; Vobornik, I; Bigi, C.; Kim, B. J.; Elfimov, I. S.; Pavarini, E.; Damascelli, A.
- Date Issued
- 2022-06
- Publisher
- AMER PHYSICAL SOC
- Abstract
- Sr2IrO4 has often been described via a simple, one-band pseudospin-12 model subject to electron-electron interactions on a square lattice, fostering analogies with cuprate superconductors believed to be well described by a similar model. In this work we argue-based on a detailed study of the low-energy electronic structure by circularly polarized spin and angle-resolved photoemission spectroscopy combined with dynamical mean-field theory calculations-that a pseudospin- 12 model fails to capture the full complexity of the system. We show instead that a realistic multiband Hubbard Hamiltonian, accounting for the full correlated t2g manifold, provides a detailed description of the interplay between spin-orbital entanglement and electron-electron interactions and yields quantitative agreement with experiments. Our analysis establishes that the j3/2 states make up a substantial percentage of the low-energy spectral weight, i.e., approximately 74% as determined from the integration of the j-resolved spectral function in the 0 to -1.64 eV energy range. The results in our work are of relevance not only to Ir-based materials but also more generally to multiorbital materials with closely spaced energy scales.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/117908
- DOI
- 10.1103/PhysRevB.105.245130
- ISSN
- 2469-9950
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 105, no. 24, 2022-06
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.