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Sun, LQ; Dai, JH; Qin, SJ; Zhang, J; Sun, LQ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
Mean field theory on the incommensurate ground state of the zigzag spin chain
Source PublicationPHYSICS LETTERS A
KeywordQuantum Renormalization-groups Nearest-neighbor Interactions Magnetic-properties Heisenberg Dimerization Cs2cucl4 Ladder
AbstractWe 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.
2002
ISSN0375-9601
Volume294Issue:40972Pages:239-244
Subject AreaPhysics
Indexed BySCI
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Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13592
Collection理论物理所科研产出_SCI论文
Corresponding AuthorSun, LQ , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
Recommended Citation
GB/T 7714
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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