Fingerprints of Mott and Slater gaps in the core-level photoemission spectra of antiferromagnetic iridates
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2024
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866914073460867072 |
|---|---|
| author | Nakagawa, K. Hariki, A. Okauchi, T. Fujiwara, H. Ahn, K. -H. Murakami, Y. Hamamoto, S. Kanai-Nakata, Y. Kadono, T. Higashiya, A. Tamasaku, K. Yabashi, M. Ishikawa, T. Sekiyama, A. Imada, S. Kuneš, J. Takase, K. Yamasaki, A. |
| author_facet | Nakagawa, K. Hariki, A. Okauchi, T. Fujiwara, H. Ahn, K. -H. Murakami, Y. Hamamoto, S. Kanai-Nakata, Y. Kadono, T. Higashiya, A. Tamasaku, K. Yabashi, M. Ishikawa, T. Sekiyama, A. Imada, S. Kuneš, J. Takase, K. Yamasaki, A. |
| contents | We present Ir $4f$ core-level hard-x-ray photoemission spectroscopy (HAXPES) experiments conducted across antiferromagnetic (AFM) ordering transition in Ruddlesden-Popper iridates Sr$_2$IrO$_4$ and Sr$_3$Ir$_2$O$_7$. The Ir $4f$ spectra exhibit distinct changes between the AFM and paramagnetic (PM) phases, with the spectral difference $I_\text{PM}-I_\text{AFM}$ showing a contrasting behavior in the two compounds. By employing computational simulations using the local-density approximation combined with the dynamical mean-field theory method, we elucidate that $I_\text{PM}-I_\text{AFM}$ primary reflects the Slater or Mott-Hubbard character of the AFM insulating state rather than material specific details. This sensitivity to fine low-energy electronic structure arises from the dependence of charge-transfer responses to the sudden creation of a localized core hole on both metal-insulator transitions and long-range AFM ordering. Our result broadens the applications of core-level HAXPES as a tool for characterization of electronic structure. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_12646 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Fingerprints of Mott and Slater gaps in the core-level photoemission spectra of antiferromagnetic iridates Nakagawa, K. Hariki, A. Okauchi, T. Fujiwara, H. Ahn, K. -H. Murakami, Y. Hamamoto, S. Kanai-Nakata, Y. Kadono, T. Higashiya, A. Tamasaku, K. Yabashi, M. Ishikawa, T. Sekiyama, A. Imada, S. Kuneš, J. Takase, K. Yamasaki, A. Strongly Correlated Electrons We present Ir $4f$ core-level hard-x-ray photoemission spectroscopy (HAXPES) experiments conducted across antiferromagnetic (AFM) ordering transition in Ruddlesden-Popper iridates Sr$_2$IrO$_4$ and Sr$_3$Ir$_2$O$_7$. The Ir $4f$ spectra exhibit distinct changes between the AFM and paramagnetic (PM) phases, with the spectral difference $I_\text{PM}-I_\text{AFM}$ showing a contrasting behavior in the two compounds. By employing computational simulations using the local-density approximation combined with the dynamical mean-field theory method, we elucidate that $I_\text{PM}-I_\text{AFM}$ primary reflects the Slater or Mott-Hubbard character of the AFM insulating state rather than material specific details. This sensitivity to fine low-energy electronic structure arises from the dependence of charge-transfer responses to the sudden creation of a localized core hole on both metal-insulator transitions and long-range AFM ordering. Our result broadens the applications of core-level HAXPES as a tool for characterization of electronic structure. |
| title | Fingerprints of Mott and Slater gaps in the core-level photoemission spectra of antiferromagnetic iridates |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2404.12646 |