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题名: Theory of Gossamer and resonating valence bond superconductivity
作者: Gan, JY ;  Zhang, FC ;  Su, ZB
刊名: PHYSICAL REVIEW B
出版日期: 2005
卷号: 71, 期号:1, 页码:-
关键词: T-J MODEL ;  VARIATIONAL MONTE-CARLO ;  HIGH-TEMPERATURE SUPERCONDUCTORS ;  D-WAVE SUPERCONDUCTIVITY ;  HUBBARD-MODEL ;  CUPRATE SUPERCONDUCTORS ;  ORGANIC SUPERCONDUCTORS ;  GAP ANISOTROPY ;  MEAN-FIELD ;  SYMMETRY
学科分类: Physics
通讯作者: Gan, JY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China; Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA
英文摘要: We use an effective Hamiltonian for two-dimensional Hubbard model including an antiferromagnetic spin-spin coupling term to study recently proposed Gossamer superconductivity. We apply a renormalized mean field theory to approximately take into account the strong correlation effect in partially projected Gutzwiller wave functions. At the half-filling, there is a first order phase transition to separate a Mott insulator at large Coulomb repulsion U from a Gossamer superconductor at small U. At the critical value U=U-c, the charge carrier density and the superconducting (SC) order parameter change discontinuously from zero in the Mott insulating phase to finite values in the Gossamer SC phase. The first order transition is due to the interplay of the kinetic and spin exchange energies. As the electron density changes away from half-filling, the Gossamer SC state changes smoothly, while the Mott insulator is evolved into a resonating valence bond (RVB) SC state. The Gossamer and RVB SC states have the same pairing symmetry. The SC order parameter changes smoothly from a RVB SC state at U>U-c to a Gossamer SC state at U
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000226735100134
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13915
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Gan, JY,Zhang, FC,Su, ZB. Theory of Gossamer and resonating valence bond superconductivity[J]. PHYSICAL REVIEW B,2005,71(1):-.
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