Exciton excitations in a one-dimensional band insulator with Hubbard interactions

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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.
刊名	CHINESE PHYSICS LETTERS
	2004
卷号	21 期号:3 页码:530-533
关键词	Mott Insulator Polarization Transition
ISSN号	0256-307X
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.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000220202600032
公开日期	2012-08-30
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/14115]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Gu, B , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
推荐引用方式 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.