Electronic Raman scattering of antiferromagnetic excitonic insulators
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910654614470656 |
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| author | Suwa, Hidemaro Zhang, Shang-Shun Batista, Cristian D. |
| author_facet | Suwa, Hidemaro Zhang, Shang-Shun Batista, Cristian D. |
| contents | The excitonic insulator, a quantum mechanical state arising from exciton condensation, was proposed theoretically many years ago but has yet to be experimentally confirmed. The discovery of correlated transition metal oxides based on $4d$ and $5d$ elements, where the on-site Coulomb repulsion is comparable to the dominant hopping amplitude, presents a unique opportunity to study exciton condensation. By constructing an effective mean field Raman operator for the Hubbard model, we derive the low-energy electronic Raman scattering cross section, demonstrating Raman spectroscopy as a powerful tool for detecting exciton condensation. Here, we demonstrate that Raman scattering directly reveals exciton condensation in the bilayer iridate Sr$_3$Ir$_2$O$_7$ under pressure. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_13715 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Electronic Raman scattering of antiferromagnetic excitonic insulators Suwa, Hidemaro Zhang, Shang-Shun Batista, Cristian D. Strongly Correlated Electrons The excitonic insulator, a quantum mechanical state arising from exciton condensation, was proposed theoretically many years ago but has yet to be experimentally confirmed. The discovery of correlated transition metal oxides based on $4d$ and $5d$ elements, where the on-site Coulomb repulsion is comparable to the dominant hopping amplitude, presents a unique opportunity to study exciton condensation. By constructing an effective mean field Raman operator for the Hubbard model, we derive the low-energy electronic Raman scattering cross section, demonstrating Raman spectroscopy as a powerful tool for detecting exciton condensation. Here, we demonstrate that Raman scattering directly reveals exciton condensation in the bilayer iridate Sr$_3$Ir$_2$O$_7$ under pressure. |
| title | Electronic Raman scattering of antiferromagnetic excitonic insulators |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2410.13715 |