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Spectrum of the hole excitation in spin-orbit Mott insulator Na$_2$IrO$_3$
- Source :
- Chin. Phys. Lett. 40, 087101 (2023)
- Publication Year :
- 2023
-
Abstract
- We study the motion of a hole with internal degrees of freedom, introduced to the zigzag magnetic ground state of Na$_2$IrO$_3$, by using the self-consistent Born approximation. We find that the low, intermediate, and high-energy spectra are primarily attributed to the singlet, triplet, and quintet hole contributions, respectively. The spectral functions exhibit distinct features such as the electron-like dispersion of low-energy states near the $\Gamma$ point, the maximum M-point intensity of mid-energy states, and the hole-like dispersion of high-energy states. These features are robust and almost insensitive to the exchange model and Hund's coupling, and are in qualitative agreement with the angular-resolved photoemission spectra observed in Na$_2$IrO$_3$. Our results reveal that the interference between internal degrees of freedom in different sublattices plays an important role in inducing the complex dispersions.
- Subjects :
- Condensed Matter - Strongly Correlated Electrons
Subjects
Details
- Database :
- arXiv
- Journal :
- Chin. Phys. Lett. 40, 087101 (2023)
- Publication Type :
- Report
- Accession number :
- edsarx.2307.14885
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/0256-307X/40/8/087101