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Mean field theory on the incommensurate ground state of the zigzag spin chain
Sun, LQ; Dai, JH; Qin, SJ; Zhang, J; Sun, LQ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
2002
发表期刊PHYSICS LETTERS A
ISSN0375-9601
卷号294期号:40972页码:239-244
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.
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
关键词Quantum Renormalization-groups Nearest-neighbor Interactions Magnetic-properties Heisenberg Dimerization Cs2cucl4 Ladder
学科领域Physics
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收录类别SCI
WOS记录号WOS:000174138100019
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被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13592
专题理论物理所1978-2010年知识产出
通讯作者Sun, LQ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
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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.
APA Sun, LQ,Dai, JH,Qin, SJ,Zhang, J,&Sun, LQ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China..(2002).Mean field theory on the incommensurate ground state of the zigzag spin chain.PHYSICS LETTERS A,294(40972),239-244.
MLA Sun, LQ,et al."Mean field theory on the incommensurate ground state of the zigzag spin chain".PHYSICS LETTERS A 294.40972(2002):239-244.
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