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Gossamer superconductivity in layered organic compounds kappa-(BEDT-TTF)(2)X
Gan, JY; Chen, Y; Su, ZB; Zhang, FC
2005
Conference Name12th Yukawa International Seminar on Physics of Strongly Correlated Electron Systems (YKIS 2004)
Source PublicationPROGRESS OF THEORETICAL PHYSICS SUPPLEMENT
Issue160
Pages15-27
Conference DateNOV 01-19, 2004
Conference PlaceKyoto Univ, Yukawa Inst Theoret Phys, Kyoto, JAPAN
Author of SourceKyoto Univ, Yukawa Inst Theoret Phys
Publication PlaceKYOTO
ISSN0375-9687
PublisherPROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE
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.
KeywordC-13 NMR PHASE-DIAGRAM CRITICAL-TEMPERATURE MOTT TRANSITION CONDUCTORS PRESSURE ANTIFERROMAGNETISM PHYSICS FLUCTUATION HUBBARD
Indexed ByCPCI
Language英语
Document Type会议论文
Identifierhttp://ir.itp.ac.cn/handle/311006/23708
CollectionSCI会议论文
Affiliation1.Tsinghua Univ, Ctr Adv Study, Beijing 100084, Peoples R China
2.Chinese Acad Sci, Inst Theoret Phys, Beijing 100001, Peoples R China
3.Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
4.Univ Hong Kong, Ctr Theoret & Computat Phys, Hong Kong, Hong Kong, Peoples R China
5.Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA
Recommended Citation
GB/T 7714
Gan, JY,Chen, Y,Su, ZB,et al. Gossamer superconductivity in layered organic compounds kappa-(BEDT-TTF)(2)X[C]//Kyoto Univ, Yukawa Inst Theoret Phys. KYOTO:PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE,2005:15-27.
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