ITP OpenIR  > SCI期刊论文
Gan, JY; Chen, Y; Su, ZB; Zhang, FC; Gan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
Gossamer superconductivity in layered organic compounds kappa-(BEDT-TTF)(2)X
Source PublicationPROGRESS OF THEORETICAL PHYSICS SUPPLEMENT
KeywordC-13 Nmr Phase-diagram Critical-temperature Mott Transition Conductors Pressure Antiferromagnetism Physics Fluctuation Hubbard
AbstractThe 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.
2005
ISSN0375-9687
Issue160Pages:15-27
Subject AreaPhysics
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13924
CollectionSCI期刊论文
Corresponding AuthorGan, JY , Tsing Hua Univ, Ctr Adv Study, Beijing 100084, Peoples R China.
Recommended Citation
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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