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题名: Mean field theory on the incommensurate ground state of the zigzag spin chain
作者: Sun, LQ ;  Dai, JH ;  Qin, SJ ;  Zhang, J
刊名: PHYSICS LETTERS A
出版日期: 2002
卷号: 294, 期号:40972, 页码:239-244
关键词: QUANTUM RENORMALIZATION-GROUPS ;  NEAREST-NEIGHBOR INTERACTIONS ;  MAGNETIC-PROPERTIES ;  HEISENBERG ;  DIMERIZATION ;  CS2CUCL4 ;  LADDER
学科分类: Physics
通讯作者: Sun, LQ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Zhejiang Univ, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China; Kyushu Univ, Dept Phys, Higashi Ku, Fukuoka 8128581, Japan; Xinjiang Univ, Dept Phys, Urumqi 830046, Peoples R China
英文摘要: We give a mean field treatment of the incommensurate phase of the zigzag spin-1/2 Heisenberg chain containing both the nearest neighbour coupling J(1) and the next nearest neighbour antiferromagnetic coupling J(2). By use of Jordan-Wigner transformation, the zigzag spin chain is mapped into an interacting spinless fermionic system with two pairs of Fermi points. The incommensurate ground state commences when one more Fermi sea begins to be filled. The mean field theory predicts a new critical point in the ferromagnetic region x(c) = -2(pi + 1)1(pi - 1) such that the system is incommensurate in region x(c) < J(1)/J(2) < 2. We conjecture that the ground state in the region x(c) > J(1)/J(2) > -4 has a nonzero total spin magnitude instead of four Fermi points. (C) 2002 Elsevier Science B.V. All rights reserved.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000174138100019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13592
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Sun, LQ,Dai, JH,Qin, SJ,et al. Mean field theory on the incommensurate ground state of the zigzag spin chain[J]. PHYSICS LETTERS A,2002,294(40972):239-244.
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