Spin-Peierls transition in low-dimensional quantum spin systems: a Green's function approach

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	Spin-Peierls transition in low-dimensional quantum spin systems: a Green's function approach
	L. J. Ding; K. L. Yao; H. H. Fu
	2009
发表期刊	Physical Chemistry Chemical Physics
ISSN	1463-9076
卷号	11 期号:48 页码:11415-11423
摘要	We study the spin-Peierls (SP) transition of one-dimensional chain polymeric complexes coupled to lattice by means of many-body Green's function theory. The chain effective elastic constant is an intrinsic factor that determines the order of SP transition. It is found that the SP transition temperature T(SP) and the susceptibility-maximum temperature T(max) are in agreement with the experimental results. When an external magnetic field is applied to the chain, it makes T(SP) and T(max) decrease, and drives the SP transition from the second order to the first order. Besides, we show that the two-site thermal entanglement entropy is a good indicator of SP transition. Further considering the effect of interchain coupling on SP transition, with weak coupling of double-chain, the theoretical values are closer to the experimental results. We also calculate the density of states and spectral functions, which show that the energy gap vanishes at a critical temperature lower than T(SP), indicating a gapless SP phase lies in the gapped dimerized phase. The interchain coupling can drive the SP transition from the second order to the first order, while the SP dimerization may collapse for large interchain couplings.
部门归属	[ding, l. j.; yao, k. l.; fu, h. h.] huazhong univ sci & technol, sch phys, wuhan 430074, peoples r china. [ding, l. j.; yao, k. l.; fu, h. h.] huazhong univ sci & technol, wuhan high magnet field ctr, wuhan 430074, peoples r china. [yao, k. l.] chinese acad sci, int ctr mat phys, shenyang 110015, peoples r china.;yao, kl (reprint author), huazhong univ sci & technol, sch phys, wuhan 430074, peoples r china;dinglinjie82@126.com klyao@mail.hust.edu.cn
关键词	Structural Phase-transition Inorganic Compound Cugeo3 Antiferromagnetic Phases Magnetic-properties Heisenberg Chain Temperature Impurity
URL	查看原文
WOS记录号	WOS:000272271400007
引用统计	被引频次：19[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/321006/31867
专题	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. Spin-Peierls transition in low-dimensional quantum spin systems: a Green's function approach[J]. Physical Chemistry Chemical Physics,2009,11(48):11415-11423.
APA	L. J. Ding,K. L. Yao,&H. H. Fu.(2009).Spin-Peierls transition in low-dimensional quantum spin systems: a Green's function approach.Physical Chemistry Chemical Physics,11(48),11415-11423.
MLA	L. J. Ding,et al."Spin-Peierls transition in low-dimensional quantum spin systems: a Green's function approach".Physical Chemistry Chemical Physics 11.48(2009):11415-11423.