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Theory of Gossamer and resonating valence bond superconductivity
Gan, JY; Zhang, FC; Su, ZB; Gan, JY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
2005
发表期刊PHYSICAL REVIEW B
ISSN1098-0121
卷号71期号:1页码:-
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
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
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
学科领域Physics
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收录类别SCI
WOS记录号WOS:000226735100134
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被引频次:25[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13915
专题1978-2010年知识产出
通讯作者Gan, JY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
推荐引用方式
GB/T 7714
Gan, JY,Zhang, FC,Su, ZB,et al. Theory of Gossamer and resonating valence bond superconductivity[J]. PHYSICAL REVIEW B,2005,71(1):-.
APA Gan, JY,Zhang, FC,Su, ZB,&Gan, JY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China..(2005).Theory of Gossamer and resonating valence bond superconductivity.PHYSICAL REVIEW B,71(1),-.
MLA Gan, JY,et al."Theory of Gossamer and resonating valence bond superconductivity".PHYSICAL REVIEW B 71.1(2005):-.
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