Band effects on the conductivity for a two-band Hubbard model

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	Band effects on the conductivity for a two-band Hubbard model
	Gu, SJ ; Cao, J ; Chen, S ; Liu, Y ; Lin, HQ
刊名	EUROPEAN PHYSICAL JOURNAL B
	2008
卷号	66 期号:4 页码:477
关键词	LAYERED QUATERNARY COMPOUND ONE-DIMENSION 43 K SUPERCONDUCTIVITY TRANSITION SYSTEMS SPIN
ISSN号	1434-6028
通讯作者	Gu, SJ: Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China.
中文摘要	The band effects on the conductivity of a one-dimensional two-band Hubbard model is studied based on the ground state energy analysis. It is found that the system with filling factor one is a metal at zero temperature if the on-site interaction U is smaller than a critical value U(c), and is an insulator if U is larger than U(c). The value of metal-insulator transition point U(c) is obtained. This result is different from that of 1D single-band Hubbard model where the quantum phase transition point U(c)=0. Therefore, the orbital degree of freedom plays an essential role in the states of matter.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/34127]
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	Gu, SJ,Cao, J,Chen, S,et al. Band effects on the conductivity for a two-band Hubbard model[J]. EUROPEAN PHYSICAL JOURNAL B,2008,66(4):477.
APA	Gu, SJ,Cao, J,Chen, S,Liu, Y,&Lin, HQ.(2008).Band effects on the conductivity for a two-band Hubbard model.EUROPEAN PHYSICAL JOURNAL B,66(4),477.
MLA	Gu, SJ,et al."Band effects on the conductivity for a two-band Hubbard model".EUROPEAN PHYSICAL JOURNAL B 66.4(2008):477.