Finite-temperature properties of excitonic condensation in the extended Falicov–Kimball model: Cluster mean-field-theory approach

Masahiro Kadosawa; Satoshi Nishimoto; Koudai Sugimoto; Yukinori Ohta

doi:10.7566/JPSJ.89.053706

Finite-temperature properties of excitonic condensation in the extended Falicov–Kimball model: Cluster mean-field-theory approach

Masahiro Kadosawa, Satoshi Nishimoto, Koudai Sugimoto, Yukinori Ohta

物理学科

研究成果: Article › 査読

6 被引用数 (Scopus)

抄録

We study the electron–hole pair (or excitonic) condensation in the extended Falicov–Kimball model at finite temperatures based on the cluster mean-field-theory approach, where we make the grand canonical exact-diagonalization analysis of small clusters using the sine-square deformation function. We thus calculate the ground-state and finite-temperature phase diagrams of the model, as well as its optical conductivity and single-particle spectra, thereby clarifying how the preformed pair states appear in the strong-coupling regime of excitonic insulators. We compare our results with experiments on Ta₂NiSe₅,.

本文言語	English
論文番号	053706
ジャーナル	Journal of the Physical Society of Japan
巻	89
号	5
DOI	https://doi.org/10.7566/JPSJ.89.053706
出版ステータス	Published - 2020 5月 15

ASJC Scopus subject areas

物理学および天文学（全般）

文献へのアクセス

10.7566/JPSJ.89.053706

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引用スタイル

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title = "Finite-temperature properties of excitonic condensation in the extended Falicov–Kimball model: Cluster mean-field-theory approach",

abstract = "We study the electron–hole pair (or excitonic) condensation in the extended Falicov–Kimball model at finite temperatures based on the cluster mean-field-theory approach, where we make the grand canonical exact-diagonalization analysis of small clusters using the sine-square deformation function. We thus calculate the ground-state and finite-temperature phase diagrams of the model, as well as its optical conductivity and single-particle spectra, thereby clarifying how the preformed pair states appear in the strong-coupling regime of excitonic insulators. We compare our results with experiments on Ta2NiSe5,.",

author = "Masahiro Kadosawa and Satoshi Nishimoto and Koudai Sugimoto and Yukinori Ohta",

note = "Funding Information: Acknowledgments We thank K. Okunishi for tutorial lectures, S. Yamamoto for enlightening discussion, C. E. Agrapidis for careful reading of our manuscript, and U. Nitzsche for technical assistance. M.K. acknowledges the hospitality of IFW Dresden during his stay in Dresden and his use of computers. This work was supported in part by Grants-in-Aid for Scientific Research from JSPS (Projects Nos. JP17K05530 and JP19K14644), by the DFG through SFB 1143 (project-id 247310070), and by Keio University Academic Development Funds for Individual Research. Publisher Copyright: {\textcopyright}2020 The Physical Society of Japan",

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AU - Ohta, Yukinori

N1 - Funding Information: Acknowledgments We thank K. Okunishi for tutorial lectures, S. Yamamoto for enlightening discussion, C. E. Agrapidis for careful reading of our manuscript, and U. Nitzsche for technical assistance. M.K. acknowledges the hospitality of IFW Dresden during his stay in Dresden and his use of computers. This work was supported in part by Grants-in-Aid for Scientific Research from JSPS (Projects Nos. JP17K05530 and JP19K14644), by the DFG through SFB 1143 (project-id 247310070), and by Keio University Academic Development Funds for Individual Research. Publisher Copyright: ©2020 The Physical Society of Japan

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