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Topological characterization of quantum phase transitions in a spin-1/2 model
Feng, Xiao-Yong; Zhang, Guang-Ming; Xiang, Tao; Feng, XY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
2007
发表期刊PHYSICAL REVIEW LETTERS
ISSN0031-9007
卷号98期号:8页码:-
摘要We have introduced a novel Majorana representation of S=1/2 spins using the Jordan-Wigner transformation and have shown that a generalized spin model of Kitaev defined on a brick-wall lattice is equivalent to a model of noninteracting Majorana fermions with Z(2) gauge fields without redundant degrees of freedom. The quantum phase transitions of the system at zero temperature are found to be of topological type and can be characterized by nonlocal string order parameters (SOP). In appropriate dual representations, these SOP become local order parameters and the basic concept of Landau theory of continuous phase transition can be applied.
部门归属Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China
关键词Breaking
学科领域Physics
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收录类别SCI
WOS记录号WOS:000244420700055
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被引频次:159[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/311006/5785
专题理论物理所1978-2010年知识产出
通讯作者Feng, XY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
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GB/T 7714
Feng, Xiao-Yong,Zhang, Guang-Ming,Xiang, Tao,et al. Topological characterization of quantum phase transitions in a spin-1/2 model[J]. PHYSICAL REVIEW LETTERS,2007,98(8):-.
APA Feng, Xiao-Yong,Zhang, Guang-Ming,Xiang, Tao,&Feng, XY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.(2007).Topological characterization of quantum phase transitions in a spin-1/2 model.PHYSICAL REVIEW LETTERS,98(8),-.
MLA Feng, Xiao-Yong,et al."Topological characterization of quantum phase transitions in a spin-1/2 model".PHYSICAL REVIEW LETTERS 98.8(2007):-.
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