Competing roles of longitudinal and transverse Hund's terms on Mott transitions

doi:10.1016/j.aop.2016.11.011

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院固体物理研究所

	Competing roles of longitudinal and transverse Hund's terms on Mott transitions
	Quan, Ya-Min 1; Yu, Xiang-Long 1; Wang, Qing-Wei 1; Zou, Liang-Jian 1,2
刊名	ANNALS OF PHYSICS
	2017-02-01
卷号	377 期号:无页码:197-209
关键词	Mott Transition Hund's Couplings Rotationally Invariant Slave Boson
DOI	10.1016/j.aop.2016.11.011
文献子类	Article
英文摘要	Effects of longitudinal (Jz) and transverse (including spin-flip J(X) and pair-hopping J(p) terms) Hund's couplings on Mott transitions of two-orbital Hubbard models are studied by the rotationally invariant slave boson approach. We show that in the half-filled asymmetric systems, the orbital selective Mott phase (OSMP) expands with increasing J(X,P)/J(z) when J(X,P)/J(Z) < 1, and has the largest region in the isotropic case (J(X,P)/J(Z) = 1); and further increasing spin-flip Hund's coupling to J(X,P)/J(Z) > 1 may quickly suppress the OSMP state. In other near-half-filled systems, the transverse Hund's coupling favors or unfavors the OSMP state, depending on the electronic correlation strength of the systems. In the quarter filled and around systems, a small J(X,P)/J(Z) < 1 has less effect on Mott transition, while a large J(X,P)/J(Z) > 1 enhances the electron itineracy and considerably increases the critical correlation strength of the Mott transition both in symmetric and asymmetric systems. These results could be addressed by different spin-orbital states favored by Jx, jp and Jz components, respectively; and the competing longitudinal and transverse Hund's coupling terms lead to most strong quantum fluctuations in the isotropic system. (C) 2016 Elsevier Inc. All rights reserved.
WOS关键词	DEGENERATE HUBBARD-MODEL ; MEAN-FIELD THEORY ; IRON PNICTIDES ; INSULATOR-TRANSITION ; SPIN
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000394197800017
资助机构	National Science Foundation of China(11204311 ; National Science Foundation of China(11204311 ; National Science Foundation of China(11204311 ; National Science Foundation of China(11204311 ; 11274310 ; 11274310 ; 11274310 ; 11274310 ; 11474287) ; 11474287) ; 11474287) ; 11474287) ; National Science Foundation of China(11204311 ; National Science Foundation of China(11204311 ; National Science Foundation of China(11204311 ; National Science Foundation of China(11204311 ; 11274310 ; 11274310 ; 11274310 ; 11274310 ; 11474287) ; 11474287) ; 11474287) ; 11474287)
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/32927]
专题	合肥物质科学研究院_中科院固体物理研究所
作者单位	1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Quan, Ya-Min,Yu, Xiang-Long,Wang, Qing-Wei,et al. Competing roles of longitudinal and transverse Hund's terms on Mott transitions[J]. ANNALS OF PHYSICS,2017,377(无):197-209.
APA	Quan, Ya-Min,Yu, Xiang-Long,Wang, Qing-Wei,&Zou, Liang-Jian.(2017).Competing roles of longitudinal and transverse Hund's terms on Mott transitions.ANNALS OF PHYSICS,377(无),197-209.
MLA	Quan, Ya-Min,et al."Competing roles of longitudinal and transverse Hund's terms on Mott transitions".ANNALS OF PHYSICS 377.无(2017):197-209.