Exact results of an alternating-bond mixed spin-1/2 and spin-1 Ising chain with both longitudinal and transverse single-ion anisotropies

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	Exact results of an alternating-bond mixed spin-1/2 and spin-1 Ising chain with both longitudinal and transverse single-ion anisotropies
	H. N. Wu; G. Z. Wei; A. Du; G. Y. Yi; W. J. Gong
	2011
发表期刊	Journal of Magnetism and Magnetic Materials
ISSN	0304-8853
卷号	323 期号:11 页码:1428-1432
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.
部门归属	[wu, haina; wei, guozhu; du, an; yi, guangyu; gong, weijiang] northeastern univ, coll sci, shenyang 110819, peoples r china. [wei, guozhu] acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;wei, gz (reprint author), northeastern univ, coll sci, shenyang 110819, peoples r china;guozhuwei02@sina.com
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
URL	查看原文
WOS记录号	WOS:000287739200002
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30775
专题	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.