Dynamical mean-field theory of two-orbital Hubbard model

doi:10.7498/aps.71.20220286

	Dynamical mean-field theory of two-orbital Hubbard model
	Ni Yu 3; Jian, Sun 2; Quan Ya-Min 1; Luo Dong-Qi 3; Song Yun 3
刊名	ACTA PHYSICA SINICA
	2022-07-20
卷号	71
关键词	dynamical mean-filed theory Mott transition two-orbital Hubbard model
ISSN号	1000-3290
DOI	10.7498/aps.71.20220286
通讯作者	Song Yun(yunsong@bnu.edu.cn)
英文摘要	The effect of interorbital hopping on orbital selective Mottness in a two-band correlation system is investigated by using the dynamical mean-field theory with the Lanczos method as impurity solver. The phase diagrams of the two-orbital Hubbard model with non-local interorbital hopping (t(12)), where the orbital selective Mott phases (OSMP) region is expanded by the increasing of the interorbital hopping. We compare the results obtained by self-consistent relations of Bethe lattice and squate lattice based on DMFT procedure, and the general OSMP physics of Bethe lattice is consistent with that of the square lattice while the critical points of two kinds of lattices are different. We extend the method to the study of half-filled Ba2CuO4-delta materials. By comparing with the band structure obtained from the density functional theory (DFT), it is found that the isotropic inter-orbital hopping has a great influence on the bandstructure. The DFT bandstructure in DMFT is considered, and the phase diagram of the material is obtained. The half-filled Ba2CuO4-delta should be orbitalselective Mott compound according to our results.
WOS关键词	RENORMALIZATION-GROUP ; INSULATOR-TRANSITION ; MOTT-INSULATOR ; ELECTRONS ; SYSTEMS
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000838518900013
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/132081]
专题	中国科学院合肥物质科学研究院
通讯作者	Song Yun
作者单位	1.Chinese Acad Sci, Key Lab Mat Phys, Inst Solid State Phys, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 2.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 3.Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Ni Yu,Jian, Sun,Quan Ya-Min,et al. Dynamical mean-field theory of two-orbital Hubbard model[J]. ACTA PHYSICA SINICA,2022,71.
APA	Ni Yu,Jian, Sun,Quan Ya-Min,Luo Dong-Qi,&Song Yun.(2022).Dynamical mean-field theory of two-orbital Hubbard model.ACTA PHYSICA SINICA,71.
MLA	Ni Yu,et al."Dynamical mean-field theory of two-orbital Hubbard model".ACTA PHYSICA SINICA 71(2022).