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	Time-reversal symmetry breaking phase in the Hubbard model: A variational cluster approach study
	Lu, Xiancong ; Lu XC(卢先聪) ; Chioncel, Liviu ; Arrigoni, Enrico
	2012-03-19
关键词	ENERGY-FUNCTIONAL APPROACH HIGH-TC SUPERCONDUCTORS COPPER-OXIDE METALS LARGE-N LIMIT SELF-ENERGY CORRELATED ELECTRONS PSEUDOGAP INSTABILITY PARAMETERS SYSTEMS
英文摘要	We study the stability of the time-reversal symmetry breaking staggered-flux phase of a single band Hubbard model, within the variational cluster approach. For intermediate and small values of the interaction U, we find metastable solutions for the staggered-flux phase, with a maximum current per bond at U approximate to 3.2. However, allowing for antiferromagnetic and superconducting long-range order it turns out that in the region at and close to half filling the antiferromagnetic phase is the most favorable energetically. The effect of nearest-neighbor interaction is also considered. Our results show that a negative nearest-neighbor interaction and finite doping favors the stability of the staggered-flux phase. We also present preliminary results for the three-band Hubbard model obtained with a restricted set of variational parameters. For this case, no spontaneous time-reversal symmetry breaking phase is found in our calculations.; National Natural Science Foundation of China [11004164, 10974163]; Austrian Science Fund (FWF) [P18551-N16]
语种	英语
出版者	AMER PHYSICAL SOC
内容类型	期刊论文
源URL	[http://dx.doi.org/10.1103/PhysRevB.85.125117]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Lu, Xiancong,Lu XC,Chioncel, Liviu,et al. Time-reversal symmetry breaking phase in the Hubbard model: A variational cluster approach study[J],2012.
APA	Lu, Xiancong,卢先聪,Chioncel, Liviu,&Arrigoni, Enrico.(2012).Time-reversal symmetry breaking phase in the Hubbard model: A variational cluster approach study..
MLA	Lu, Xiancong,et al."Time-reversal symmetry breaking phase in the Hubbard model: A variational cluster approach study".(2012).

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