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Conference Paper: Gossamer superconductivity in layered organic compounds κ-(BEDT-TTF) 2X

TitleGossamer superconductivity in layered organic compounds κ-(BEDT-TTF) 2X
Authors
Issue Date2005
PublisherYukawa Institute for Theoretical Physics. The Journal's web site is located at http://ptps.oxfordjournals.org/
Citation
Progress Of Theoretical Physics Supplement, 2005, v. 160, p. 15-27 How to Cite?
AbstractThe layered organic superconductors κ-(BEDT-TTF) 2X 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.
Persistent Identifierhttp://hdl.handle.net/10722/92212
ISSN
2012 Impact Factor: 1.249
2015 SCImago Journal Rankings: 0.226
References

 

DC FieldValueLanguage
dc.contributor.authorGan, JYen_HK
dc.contributor.authorChen, Yen_HK
dc.contributor.authorSu, ZBen_HK
dc.contributor.authorZhang, FCen_HK
dc.date.accessioned2010-09-17T10:39:22Z-
dc.date.available2010-09-17T10:39:22Z-
dc.date.issued2005en_HK
dc.identifier.citationProgress Of Theoretical Physics Supplement, 2005, v. 160, p. 15-27en_HK
dc.identifier.issn0375-9687en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92212-
dc.description.abstractThe layered organic superconductors κ-(BEDT-TTF) 2X 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.en_HK
dc.languageengen_HK
dc.publisherYukawa Institute for Theoretical Physics. The Journal's web site is located at http://ptps.oxfordjournals.org/en_HK
dc.relation.ispartofProgress of Theoretical Physics Supplementen_HK
dc.titleGossamer superconductivity in layered organic compounds κ-(BEDT-TTF) 2Xen_HK
dc.typeConference_Paperen_HK
dc.identifier.emailZhang, FC: fuchun@hkucc.hku.hken_HK
dc.identifier.authorityZhang, FC=rp00840en_HK
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1143/PTPS.160.15en_HK
dc.identifier.scopuseid_2-s2.0-33646024928en_HK
dc.identifier.hkuros116327-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33646024928&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume160en_HK
dc.identifier.spage15en_HK
dc.identifier.epage27en_HK
dc.identifier.eissn1347-4081-
dc.publisher.placeJapanen_HK
dc.identifier.scopusauthoridGan, JY=16024720900en_HK
dc.identifier.scopusauthoridChen, Y=7601428288en_HK
dc.identifier.scopusauthoridSu, ZB=7402248667en_HK
dc.identifier.scopusauthoridZhang, FC=14012468800en_HK

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