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Kaneko, Tatsuya and Ueda, Ryota and Ejima, Satoshi (2026) Correlation-driven branch in doped excitonic insulators. Physical Review B, 113, p. 165128. American Physical Society. doi: 10.1103/nqsm-tyht. ISSN 2469-9950.
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Abstract
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.
| Item URL in elib: | https://elib.dlr.de/224032/ | ||||||||||||||||
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| Document Type: | Article | ||||||||||||||||
| Additional Information: | Satoshi Ejima acknowledges the Q-Neko project, which has received funding from the European Union's Horizon Europe research and innovation programme under Grant Agreement No. 101241875. This work was also performed for Council for Science, Technology and Innovation (CSTI), Cross-ministerial Strategic Innovation Promotion Program (SIP), “Promoting the application of advanced quantum technology platforms to social issues” (Funding agency: QST). | ||||||||||||||||
| Title: | Correlation-driven branch in doped excitonic insulators | ||||||||||||||||
| Authors: |
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| Date: | 15 April 2026 | ||||||||||||||||
| Journal or Publication Title: | Physical Review B | ||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||
| Open Access: | No | ||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||
| In ISI Web of Science: | Yes | ||||||||||||||||
| Volume: | 113 | ||||||||||||||||
| DOI: | 10.1103/nqsm-tyht | ||||||||||||||||
| Page Range: | p. 165128 | ||||||||||||||||
| Publisher: | American Physical Society | ||||||||||||||||
| Series Name: | Physical Review B | ||||||||||||||||
| ISSN: | 2469-9950 | ||||||||||||||||
| Status: | Published | ||||||||||||||||
| Keywords: | Excitonic insulator, doping effects, tensor network algorithms, strongly correlated systems | ||||||||||||||||
| HGF - Research field: | other | ||||||||||||||||
| HGF - Program: | other | ||||||||||||||||
| HGF - Program Themes: | other | ||||||||||||||||
| DLR - Research area: | Quantum Computing Initiative | ||||||||||||||||
| DLR - Program: | QC SW - Software | ||||||||||||||||
| DLR - Research theme (Project): | QC - ALQU | ||||||||||||||||
| Location: | Hamburg , Köln-Porz | ||||||||||||||||
| Institutes and Institutions: | Institute of Software Technology > High-Performance Computing Institute of Software Technology | ||||||||||||||||
| Deposited By: | Ejima, Satoshi | ||||||||||||||||
| Deposited On: | 27 Apr 2026 10:27 | ||||||||||||||||
| Last Modified: | 27 Apr 2026 10:27 |
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