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Gossamer superconductivity in layered organic compounds kappa-(BEDT-TTF)(2)X
Gan, JY; Chen, Y; Su, ZB; Zhang, FC; Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
2005
发表期刊PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT
ISSN0375-9687
期号160页码:15-27
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.
部门归属Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100001, Peoples R China; Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China; Univ Hong Kong, Ctr Theoret & Computat Phys, Hong Kong, Hong Kong, Peoples R China; Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA
关键词C-13 Nmr Phase-diagram Critical-temperature Mott Transition Conductors Pressure Antiferromagnetism Physics Fluctuation Hubbard
学科领域Physics
收录类别SCI
WOS记录号WOS:000235411000003
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13924
专题理论物理所SCI论文
通讯作者Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
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GB/T 7714
Gan, JY,Chen, Y,Su, ZB,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,Su, ZB,Zhang, FC,&Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China..(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.
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