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Exciton excitations in a one-dimensional band insulator with Hubbard interactions
Gu, B; Lou, JZ; Qin, SJ; Xiang, T; Gu, B , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
2004
发表期刊CHINESE PHYSICS LETTERS
ISSN0256-307X
卷号21期号:3页码:530-533
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.
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
关键词Mott Insulator Polarization Transition
学科领域Physics
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收录类别SCI
WOS记录号WOS:000220202600032
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/14115
专题1978-2010年知识产出
通讯作者Gu, B , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
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GB/T 7714
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.
APA Gu, B,Lou, JZ,Qin, SJ,Xiang, T,&Gu, B , Peking Univ, Dept Phys, Beijing 100871, Peoples R China..(2004).Exciton excitations in a one-dimensional band insulator with Hubbard interactions.CHINESE PHYSICS LETTERS,21(3),530-533.
MLA Gu, B,et al."Exciton excitations in a one-dimensional band insulator with Hubbard interactions".CHINESE PHYSICS LETTERS 21.3(2004):530-533.
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