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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