Spectral function of the one-dimensional Holstein model at half filling

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	Spectral function of the one-dimensional Holstein model at half filling
	Zhao, H ; Wu, CQ ; Lin, HQ
刊名	PHYSICAL REVIEW B
	2005
卷号	71 期号:11
关键词	MOLECULAR-CRYSTAL MODEL 2-DIMENSIONAL HUBBARD-MODEL PERTURBATION-THEORY POLARON MOTION DENSITY WEIGHT
ISSN号	1098-0121
通讯作者	Wu, CQ (reprint author), Fudan Univ, Res Ctr Theoret Phys, Shanghai 200433, Peoples R China.
中文摘要	The one-electron spectral function of the one-dimensional spin-1/2 Holstein model at half filling is computed by use of the cluster perturbation theory. The cluster Green's function is obtained by the Lanczos exact diagonalization method within an optimized phonon approach. It is shown that the method allows reliable calculations using a relatively small size cluster and a few optimal phonon bases for the system from weak to strong electron-phonon coupling. In the strong-coupling limit, the spectral function shows the excitation behavior of a bipolaron state with a large gap at the Fermi surface. However, the obtained spectral function displays a metallic character in the weak-coupling regime, which is in accord with the suggestion that the Peierls gap is suppressed by quantum fluctuation of the phonons.
收录类别	SCI
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/52835]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhao, H,Wu, CQ,Lin, HQ. Spectral function of the one-dimensional Holstein model at half filling[J]. PHYSICAL REVIEW B,2005,71(11).
APA	Zhao, H,Wu, CQ,&Lin, HQ.(2005).Spectral function of the one-dimensional Holstein model at half filling.PHYSICAL REVIEW B,71(11).
MLA	Zhao, H,et al."Spectral function of the one-dimensional Holstein model at half filling".PHYSICAL REVIEW B 71.11(2005).