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题名: Exciton excitations in a one-dimensional band insulator with Hubbard interactions
作者: Gu, B ;  Lou, JZ ;  Qin, SJ ;  Xiang, T
刊名: CHINESE PHYSICS LETTERS
出版日期: 2004
卷号: 21, 期号:3, 页码:530-533
关键词: MOTT INSULATOR ;  POLARIZATION ;  TRANSITION
学科分类: Physics
通讯作者: Gu, B , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
部门归属: Peking Univ, Dept Phys, Beijing 100871, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Georgia Inst Technol, PHP Inst Bioengn & Biosci, Atlanta, GA 30332 USA; Chinese Acad Sci, Interdisciplinary Ctr Theoret Studies, Beijing 100080, Peoples R China
英文摘要: We study the properties of exciton excitations in the Hubbard model with alternating potential and dimerized hopping terms at half filling. With increasing Coulomb repulsive, we find that a spin triplet exciton band develops below the band gap. At certain critical interaction, the excitation gap of this exciton band vanishes and a new phase with a dimerized ground state emerges. The value of this critical Coulomb interaction is determined perturbatively.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000220202600032
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14115
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:
Gu, B,Lou, JZ,Qin, SJ,et al. Exciton excitations in a one-dimensional band insulator with Hubbard interactions[J]. CHINESE PHYSICS LETTERS,2004,21(3):530-533.
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