Phase Diagrams of the Excitonic Insulator State: Analyzing the Excitonic Susceptibility

• Autorzy: Do Thi Hong Hai , Nguyen Thi Hau

Identyfikatory

DOI

10.29227/IM-2021-02-17

• Języki publikacji: EN

Abstrakty

EN

In this paper, the formation of the excitonic insulator state in the rare-earth chalcogenides has been investigated through the extended Falicov-Kimball model. Adapting the unrestricted Hartree-Fock approximation, we have derived a set of explicitly self-consistent equations determining expectation values and the excitonic susceptibility in the system. Analyzing the excitonic susceptibility, we have established phase diagrams of the excitonic insulator state depending on the model parameters. The phase structures confirmed the excitonic insulator state is found at low temperature and between two critical values of the Coulomb interaction. The effect of the external pressure on the formation of the excitonic insulator state is also shown.

Słowa kluczowe

EN

unrestricted Hartree-Fock approximation; Falicov-Kimball model; excitonic insulator; excitonic susceptibility; rare-earth chalcogenide

PL

izolatory; model Falicova-Kimballa; materiały rzadkie

• Wydawca: Polskie Towarzystwo Przeróbki Kopalin
• Czasopismo: Inżynieria Mineralna
• Rocznik: 2021
• Tom: no. 2
• Strony: 199--206
• Opis fizyczny: Bibliogr. 23 poz., wykr.

Twórcy

autor

Do Thi Hong Hai

• Hanoi University of Mining and Geology, 18 Vien street, Hanoi, Vietnam

autor

Nguyen Thi Hau

• Hanoi University of Mining and Geology, 18 Vien street, Hanoi, Vietnam

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).