Doublon-holon binding, Mott transition, and fractionalized antiferromagnet in the Hubbard model

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	Doublon-holon binding, Mott transition, and fractionalized antiferromagnet in the Hubbard model
	Zhou, S ; Wang, YP ; Wang, ZQ
刊名	PHYSICAL REVIEW B
	2014
卷号	89 期号:19
ISSN号	1098-0121
通讯作者	Zhou, S (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
中文摘要	We argue that the binding between doubly occupied (doublon) and empty (holon) sites governs incoherent excitations and plays a key role in the Mott transition in strongly correlated Mott-Hubbard systems. We construct a new saddle-point solution with doublon-holon binding in the Kotliar-Ruckenstein slave-boson functional integral formulation of the Hubbard model. On a half-filled honeycomb lattice and square lattice, the ground state is found to exhibit a continuous transition from a paramagnetic semimetal/metal to an antiferromagnetic-ordered Slater insulator with coherent quasiparticles at U-cl, followed by a Mott transition into an electron-fractionalized AF* phase without coherent excitations at U-c2. Such a phase structure appears to be generic for bipartite lattices without frustration. We show that doublon-holon binding unites the three important ideas of strong correlation: coherent quasiparticles, incoherent Hubbard bands, and deconfined Mott insulator.
资助信息	DOE [DE-FG02-99ER45747, DE-SC0002554]; Thousand Youth Talents Plan of China
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59540]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhou, S,Wang, YP,Wang, ZQ. Doublon-holon binding, Mott transition, and fractionalized antiferromagnet in the Hubbard model[J]. PHYSICAL REVIEW B,2014,89(19).
APA	Zhou, S,Wang, YP,&Wang, ZQ.(2014).Doublon-holon binding, Mott transition, and fractionalized antiferromagnet in the Hubbard model.PHYSICAL REVIEW B,89(19).
MLA	Zhou, S,et al."Doublon-holon binding, Mott transition, and fractionalized antiferromagnet in the Hubbard model".PHYSICAL REVIEW B 89.19(2014).