Mott transition and antiferromagnetism of cold fermions in the decorated honeycomb lattice

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	Mott transition and antiferromagnetism of cold fermions in the decorated honeycomb lattice
	Lin, HF ; Chen, YH ; Liu, HD ; Tao, HS ; Liu, WM
刊名	PHYSICAL REVIEW A
	2014
卷号	90 期号:5
ISSN号	1050-2947
通讯作者	Lin, HF (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	We investigate two-component ultracold fermions loaded in a decorated honeycomb lattice described by the Hubbard model with repulsive interactions and nearest-neighbor hopping. The phase transitions are studied by combining the cellular dynamical mean-field theory with the continuous-time quantum Monte Carlo method. For weak interactions, the quadratic band crossing point is broken to a linear band crossing point and the system becomes a semimetal. With increasing interaction, the system undergoes a first-order phase transition to an antiferromagnetic Mott insulator at low temperatures. Below the critical temperature, due to the charge nematic fluctuation, a nematic metal forms between the semimetal and the antiferromagnetic Mott insulator. The effects of lattice anisotropy are also addressed. Furthermore, we discuss how to detect these phases in real experiments.
资助信息	NKBRSFC [2011CB921502, 2012CB821305]; NSFC [61227902, 61378017, 61405003, 11434015]; SKLQOQOD [KF201403]; SPRPCAS [XDB01020300]
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/311004/59456]
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	Lin, HF,Chen, YH,Liu, HD,et al. Mott transition and antiferromagnetism of cold fermions in the decorated honeycomb lattice[J]. PHYSICAL REVIEW A,2014,90(5).
APA	Lin, HF,Chen, YH,Liu, HD,Tao, HS,&Liu, WM.(2014).Mott transition and antiferromagnetism of cold fermions in the decorated honeycomb lattice.PHYSICAL REVIEW A,90(5).
MLA	Lin, HF,et al."Mott transition and antiferromagnetism of cold fermions in the decorated honeycomb lattice".PHYSICAL REVIEW A 90.5(2014).