Magnetic-field-driven quantum criticality and thermodynamics in trimerized spin-1/2 isotropic XY chain with three-spin interactions
文献类型：期刊论文
| 作者 | L. J. Ding ; K. L. Yao ; H. H. Fu |
| 刊名 | Physica Status Solidi B-Basic Solid State Physics
 |
| 出版日期 | 2010 |
| 卷号 | 247期号:9页码:2274-2283 |
| 关键词 | quantum phase transition Green's function method magnetic critical points behavior model |
| ISSN号 | 0370-1972 |
| 中文摘要 | The quantum criticality and thermodynamics for the trimerized spin-1/2 isotropic XY chain with three-spin interactions in an external magnetic field are investigated by means of the Green's function theory combined with Jordan-Wigner transformation. The ground-state phase diagrams are explored, in which various phases are identified and described by typical M-h curves. Therein, two cusps emerge for strong three-spin interactions in two gapless phases at low and high fields, respectively. Moreover, the spin correlations and two-site entanglement entropy are calculated for a further understanding of quantum phase transition (QPT). It is also found that the magnetic-field-driven quantum criticality is closely related to the energy spectrum, in which an energy gap responsible for the appearance of 1/3 magnetization plateau can be opened up by three-spin interactions. The critical behavior disappears when the temperature becomes nonzero, yielding only a crossover behavior. In addition, the gapped low-lying excitations are responsible for the observed thermodynamic behaviors, wherein a structure with three peaks in the temperature dependence of specific heat is unveiled. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31073]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | L. J. Ding,K. L. Yao,H. H. Fu. Magnetic-field-driven quantum criticality and thermodynamics in trimerized spin-1/2 isotropic XY chain with three-spin interactions[J]. Physica Status Solidi B-Basic Solid State Physics,2010,247(9):2274-2283. |
| APA | L. J. Ding,K. L. Yao,&H. H. Fu.(2010).Magnetic-field-driven quantum criticality and thermodynamics in trimerized spin-1/2 isotropic XY chain with three-spin interactions.Physica Status Solidi B-Basic Solid State Physics,247(9),2274-2283. |
| MLA | L. J. Ding,et al."Magnetic-field-driven quantum criticality and thermodynamics in trimerized spin-1/2 isotropic XY chain with three-spin interactions".Physica Status Solidi B-Basic Solid State Physics 247.9(2010):2274-2283. |
入库方式： OAI收割
来源：金属研究所
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