Exact results of an alternating-bond mixed spin-1/2 and spin-1 Ising chain with both longitudinal and transverse single-ion anisotropies
文献类型：期刊论文
| 作者 | H. N. Wu ; G. Z. Wei ; A. Du ; G. Y. Yi ; W. J. Gong |
| 刊名 | Journal of Magnetism and Magnetic Materials
 |
| 出版日期 | 2011 |
| 卷号 | 323期号:11页码:1428-1432 |
| 关键词 | Mixed spin Ising chain Single-ion anisotropy Bond alternation Exact result low-temperature properties ferrimagnetic chain field-theory quantum s=1/2 |
| ISSN号 | 0304-8853 |
| 中文摘要 | The alternating-bond mixed spin-1/2 and spin-1 Ising chain with both longitudinal and transverse singleion anisotropies are solved exactly by means of a mapping of the spin-1/2 transverse Ising chain and the Jordan-Wigner transformation. The ground state quantities are strongly dependent on the model Hamiltonian parameters J(1), J(2), D(x) and D(z). We obtain the quasi-particles' spectra A(k), the dimerization gap Delta(d), the minimal energy Delta(0) for exciting a fermion quasi-particle, the minimal energy Delta(h) for exciting a hole and the ground state energy E(g). The phase diagram of the ground state is also given. The results show that the alternating bond just quantitatively changes the ground state properties; no matter the nearest-neighbor exchange interactions J(1) and J(2) are equal or not, when D(z) >= 0 for any finite value of D(x) there is no quantum critical point and the ground state is always in a spin ordered phase. (C) 2011 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/30775]  |
| 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 | H. N. Wu,G. Z. Wei,A. Du,et al. Exact results of an alternating-bond mixed spin-1/2 and spin-1 Ising chain with both longitudinal and transverse single-ion anisotropies[J]. Journal of Magnetism and Magnetic Materials,2011,323(11):1428-1432. |
| APA | H. N. Wu,G. Z. Wei,A. Du,G. Y. Yi,&W. J. Gong.(2011).Exact results of an alternating-bond mixed spin-1/2 and spin-1 Ising chain with both longitudinal and transverse single-ion anisotropies.Journal of Magnetism and Magnetic Materials,323(11),1428-1432. |
| MLA | H. N. Wu,et al."Exact results of an alternating-bond mixed spin-1/2 and spin-1 Ising chain with both longitudinal and transverse single-ion anisotropies".Journal of Magnetism and Magnetic Materials 323.11(2011):1428-1432. |
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来源：金属研究所
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