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Magnon dispersion and thermodynamics in CsNiF3
Karadamoglou, J; Papanicolaou, N; Wang, X; Zotos, X; Wang, X , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
2001
发表期刊PHYSICAL REVIEW B
ISSN0163-1829
卷号63期号:22页码:-
摘要We present an accurate transfer matrix renormalization group calculation of the thermodynamics in a quantum spin-1 planar ferromagnetic chain. We also calculate the field dependence of the magnon gap and confirm the accuracy of the magnon dispersion derived earlier through a 1/n expansion. We are thus able to examine the validity of a number of previous calculations and further analyze a wide range of experiments on CsNiF3 concerning the magnon dispersion, magnetization, susceptibility, and specific hear. Although it is not possible to account for all data with a single set of parameters, the overall qualitative agreement is good and the remaining discrepancies may reflect a departure from ideal quasi-one-dimensional model behavior. Finally, we present some indirect evidence to the effect that the popular interpretation of the excess specific heat in terms of sine-Gordon solitons may not be appropriate.
部门归属Univ Crete, Dept Phys, Heraklion, Greece; Res Ctr Crete, Heraklion, Greece; PHB Ecublens, IRRMA, CH-1015 Lausanne, Switzerland
关键词Matrix Renormalization-group Heisenberg Chain Magnetic-field Quantum Ferromagnets Temperature Anisotropy Heat
学科领域Physics
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收录类别SCI
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12737
专题理论物理所1978-2010年知识产出
通讯作者Wang, X , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
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GB/T 7714
Karadamoglou, J,Papanicolaou, N,Wang, X,et al. Magnon dispersion and thermodynamics in CsNiF3[J]. PHYSICAL REVIEW B,2001,63(22):-.
APA Karadamoglou, J,Papanicolaou, N,Wang, X,Zotos, X,&Wang, X , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China..(2001).Magnon dispersion and thermodynamics in CsNiF3.PHYSICAL REVIEW B,63(22),-.
MLA Karadamoglou, J,et al."Magnon dispersion and thermodynamics in CsNiF3".PHYSICAL REVIEW B 63.22(2001):-.
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