Gossamer superconductivity in layered organic compounds kappa-(BEDT-TTF)(2)X

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	Gossamer superconductivity in layered organic compounds kappa-(BEDT-TTF)(2)X
	Gan, JY; Chen, Y; Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.; Su, ZB; Zhang, FC
刊名	PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT
	2005
期号	160 页码:15-27
关键词	C-13 Nmr Phase-diagram Critical-temperature Mott Transition Conductors Pressure Antiferromagnetism Physics Fluctuation Hubbard
ISSN号	0375-9687
英文摘要	The layered organic superconductors kappa-(BEDT-TTF)(2)X exhibit similar normal and superconducting state properties with those of the high temperature cuprate superconductors. Many experimental measurements support the version that the superconducting state is on the verge of the Mott insulator. Using the strong-coupling approach, we employ the Gutzwiller variational method to study a two-dimensional Hubbard model including a spin exchange coupling term on an anisotropic triangular lattice as a minimal model for the compounds. The ground state is found to be a Gossamer superconductor at a small on-site Coulomb repulsion U and an antiferromagnetic Mott insulator at large U, separated by a first order phase transition. The lattice structure anisotropy, or the ratio of the hopping integrals along different lattice orientation t'/t plays an important role in determining the highly non-trivial phase diagram. Our theory is qualitatively consistent with major experiments reported in organic superconductors.
学科主题	Physics
WOS记录号	WOS:000235411000003
公开日期	2012-08-30
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/13924]
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	Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
推荐引用方式 GB/T 7714	Gan, JY,Chen, Y,Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.,et al. Gossamer superconductivity in layered organic compounds kappa-(BEDT-TTF)(2)X[J]. PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT,2005(160):15-27.
APA	Gan, JY,Chen, Y,Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.,Su, ZB,&Zhang, FC.(2005).Gossamer superconductivity in layered organic compounds kappa-(BEDT-TTF)(2)X.PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT(160),15-27.
MLA	Gan, JY,et al."Gossamer superconductivity in layered organic compounds kappa-(BEDT-TTF)(2)X".PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT .160(2005):15-27.