Quantum Monte Carlo study on the phase transition for a generalized two-dimensional staggered dimerized Heisenberg model

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	Quantum Monte Carlo study on the phase transition for a generalized two-dimensional staggered dimerized Heisenberg model
	Zheng, R ; Liu, BG
刊名	CHINESE PHYSICS B
	2012
卷号	21 期号:11
关键词	VALENCE-BOND GROUND-STATES SPIN-PEIERLS ANTIFERROMAGNETS
ISSN号	1674-1056
通讯作者	Zheng, R (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	In order to gain a deeper understanding of the quantum criticality in the explicitly staggered dimerized Heisenberg models, we study a generalized staggered dimer model named the J(0)-J(1)-J(2) model, which corresponds to the staggered J-J' model on a square lattice and a honeycomb lattice when J(1)/J(0) equals 1 and 0, respectively. Using the quantum Monte Carlo method, we investigate all the quantum critical points of these models with J(1)/J(0) changing from 0 to 1 as a function of coupling ratio alpha = J(2)/J(0). We extract all the critical values of the coupling ratio alpha(c), for these models, and we also obtain the critical exponents nu, beta/nu, and eta using different finite-size scaling ansatz,. All these exponents are not consistent with the three-dimensional Heisenberg universality class, indicating some unconventional quantum critical points in these models.
收录类别	SCI
资助信息	National Natural Science Foundation of China [11174359, 10874232]; National Basic Research Program of China [2012CB932302]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/51701]
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	Zheng, R,Liu, BG. Quantum Monte Carlo study on the phase transition for a generalized two-dimensional staggered dimerized Heisenberg model[J]. CHINESE PHYSICS B,2012,21(11).
APA	Zheng, R,&Liu, BG.(2012).Quantum Monte Carlo study on the phase transition for a generalized two-dimensional staggered dimerized Heisenberg model.CHINESE PHYSICS B,21(11).
MLA	Zheng, R,et al."Quantum Monte Carlo study on the phase transition for a generalized two-dimensional staggered dimerized Heisenberg model".CHINESE PHYSICS B 21.11(2012).