Correlation-driven branch in doped excitonic insulators
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866910132369096704 |
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| author | Kaneko, Tatsuya Ueda, Ryota Ejima, Satoshi |
| author_facet | Kaneko, Tatsuya Ueda, Ryota Ejima, Satoshi |
| contents | We investigate the spectral properties of doped one-dimensional excitonic insulators. Employing matrix-product-state-based methods, we compute the single-particle spectrum and optical conductivity in a correlated two-band model. Our numerical calculation reveals the emergence of a correlation-driven in-gap branch in the doped state. The origin of the in-gap branch is examined by decomposing the propagation dynamics of a single particle, elucidating that the doping-induced branch is associated with excitonic correlations. Our demonstrations suggest that the doping-induced branch can serve as an indicator of electron-hole correlations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_13890 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Correlation-driven branch in doped excitonic insulators Kaneko, Tatsuya Ueda, Ryota Ejima, Satoshi Strongly Correlated Electrons We investigate the spectral properties of doped one-dimensional excitonic insulators. Employing matrix-product-state-based methods, we compute the single-particle spectrum and optical conductivity in a correlated two-band model. Our numerical calculation reveals the emergence of a correlation-driven in-gap branch in the doped state. The origin of the in-gap branch is examined by decomposing the propagation dynamics of a single particle, elucidating that the doping-induced branch is associated with excitonic correlations. Our demonstrations suggest that the doping-induced branch can serve as an indicator of electron-hole correlations. |
| title | Correlation-driven branch in doped excitonic insulators |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2601.13890 |