ITP OpenIR  > 理论物理所2011年知识产出
Low-energy properties of anisotropic two-dimensional spin-1/2 Heisenberg models in staggered magnetic fields
Xi, B; Hu, SJ; Zhao, JZ; Su, G; Normand, B; Wang, XQ; Xi, B (reprint author), Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China.
2011
发表期刊PHYSICAL REVIEW B
ISSN1098-0121
卷号84期号:13页码:134407
摘要We present a systematic study of the anisotropic spin-1/2 Heisenberg model in staggered magnetic fields in two dimensions. To mimic real materials, we consider a system of coupled, antiferromagnetic chains, whose interchain interaction can be either ferro-or antiferromagnetic. When the staggered field is commensurate with the magnetic interactions, an energy gap opens immediately and follows a power law as a function of the applied field, similar to the situation in one dimension. When the field competes with the interactions, a quantum phase transition (QPT) occurs from a gapless, magnetically ordered phase at low fields to a gapped, disordered regime. We use a continuous-time Monte Carlo method to compute the staggered moment of the ordered phases and the spin gap of the disordered phases. We deduce the phase diagrams as functions of the anisotropy ratio and the applied field, and calculate the scaling behavior of the models in both quantities. We show that in the competitive case, the staggered field acts to maintain a regime of quasi-1D behavior around the QPT, and we discuss as a consequence the nature of the crossover from one-dimensional (1D) to 2D physics.
部门归属[Xi, Bin; Hu, Shijie; Normand, B.; Wang, Xiaoqun] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China; [Xi, Bin] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Xi, Bin; Su, Gang] Chinese Acad Sci, Grad Univ, Coll Phys Sci, Beijing 100049, Peoples R China; [Hu, Shijie] Univ Gottingen, Inst Theoret Phys, D-37077 Gottingen, Germany; [Zhao, Jize] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan; [Zhao, Jize] Calif State Univ Northridge, Dept Phys & Astron, Northridge, CA 91330 USA
关键词Dimensional S=1/2 Antiferromagnet Cu Benzoate Induced Gap Copper Benzoate Chains Systems Excitation Yb4as3 Esr
学科领域Physics
资助者Japan Society for the Promotion of Science; National Science Foundation of China [10874244]; Chinese Ministry of Science and Technology [2007CB925001]; Chinese Ministry of Education ; Japan Society for the Promotion of Science; National Science Foundation of China [10874244]; Chinese Ministry of Science and Technology [2007CB925001]; Chinese Ministry of Education ; Japan Society for the Promotion of Science; National Science Foundation of China [10874244]; Chinese Ministry of Science and Technology [2007CB925001]; Chinese Ministry of Education ; Japan Society for the Promotion of Science; National Science Foundation of China [10874244]; Chinese Ministry of Science and Technology [2007CB925001]; Chinese Ministry of Education
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收录类别SCI
语种英语
资助者Japan Society for the Promotion of Science; National Science Foundation of China [10874244]; Chinese Ministry of Science and Technology [2007CB925001]; Chinese Ministry of Education ; Japan Society for the Promotion of Science; National Science Foundation of China [10874244]; Chinese Ministry of Science and Technology [2007CB925001]; Chinese Ministry of Education ; Japan Society for the Promotion of Science; National Science Foundation of China [10874244]; Chinese Ministry of Science and Technology [2007CB925001]; Chinese Ministry of Education ; Japan Society for the Promotion of Science; National Science Foundation of China [10874244]; Chinese Ministry of Science and Technology [2007CB925001]; Chinese Ministry of Education
WOS记录号WOS:000295793900006
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/14257
专题理论物理所2011年知识产出
通讯作者Xi, B (reprint author), Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China.
推荐引用方式
GB/T 7714
Xi, B,Hu, SJ,Zhao, JZ,et al. Low-energy properties of anisotropic two-dimensional spin-1/2 Heisenberg models in staggered magnetic fields[J]. PHYSICAL REVIEW B,2011,84(13):134407.
APA Xi, B.,Hu, SJ.,Zhao, JZ.,Su, G.,Normand, B.,...&Xi, B .(2011).Low-energy properties of anisotropic two-dimensional spin-1/2 Heisenberg models in staggered magnetic fields.PHYSICAL REVIEW B,84(13),134407.
MLA Xi, B,et al."Low-energy properties of anisotropic two-dimensional spin-1/2 Heisenberg models in staggered magnetic fields".PHYSICAL REVIEW B 84.13(2011):134407.
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