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Interplay Between Strongly Correlate...

Liu, Fangze,

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Interplay Between Strongly Correlated and Itinerant Electrons /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Interplay Between Strongly Correlated and Itinerant Electrons // Fangze Liu.
作者:	Liu, Fangze,
面頁冊數:	1 electronic resource (169 pages)
附註:	Source: Dissertations Abstracts International, Volume: 86-05, Section: B.
Contained By:	Dissertations Abstracts International86-05B.
標題:	Electrons. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31643402
ISBN:	9798346384632

Interplay Between Strongly Correlated and Itinerant Electrons /
Liu, Fangze,

Interplay Between Strongly Correlated and Itinerant Electrons /Fangze Liu. - 1 electronic resource (169 pages)

Source: Dissertations Abstracts International, Volume: 86-05, Section: B.

Strongly correlated and itinerant electrons coexist in a wide class of materials like infinite-layer nickelate superconductors and heavy-fermion systems. In this thesis, I will present numerical studies of a minimal bilayer Hubbard model with a nearly half-filled interacting layer and a non-interacting layer to explore the relevant physics in two dimensions. In the hope of describing the infinite-layer nickelates, I will present the results obtained by a numerically exact approach, determinant quantum Monte Carlo (DQMC), of the case with dilute itinerant electrons doped from the interacting layer. The results qualitatively agree with experimental observations of the undoped compounds and suggest that Kondo singlets characterize the low-energy physics. I will also discuss the strong-coupling regime with a nearly half-filled itinerant layer. Both DQMC simulations of the model and a mean-field study of its effective model (the Kondo-Heisenberg model) suggest that the vicinity of the Kondo insulating phase could be a promising place for the emergence of exotic superconducting phases, such as pair-density waves.

English

ISBN: 9798346384632Subjects--Topical Terms:

516581
Electrons.

Interplay Between Strongly Correlated and Itinerant Electrons /
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520 $a Strongly correlated and itinerant electrons coexist in a wide class of materials like infinite-layer nickelate superconductors and heavy-fermion systems. In this thesis, I will present numerical studies of a minimal bilayer Hubbard model with a nearly half-filled interacting layer and a non-interacting layer to explore the relevant physics in two dimensions. In the hope of describing the infinite-layer nickelates, I will present the results obtained by a numerically exact approach, determinant quantum Monte Carlo (DQMC), of the case with dilute itinerant electrons doped from the interacting layer. The results qualitatively agree with experimental observations of the undoped compounds and suggest that Kondo singlets characterize the low-energy physics. I will also discuss the strong-coupling regime with a nearly half-filled itinerant layer. Both DQMC simulations of the model and a mean-field study of its effective model (the Kondo-Heisenberg model) suggest that the vicinity of the Kondo insulating phase could be a promising place for the emergence of exotic superconducting phases, such as pair-density waves.
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