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Gan, JY; Zhang, FC; Su, ZB; Gan, JY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
Theory of Gossamer and resonating valence bond superconductivity
Source PublicationPHYSICAL REVIEW B
KeywordT-j Model Variational Monte-carlo High-temperature Superconductors D-wave Superconductivity Hubbard-model Cuprate Superconductors Organic Superconductors Gap Anisotropy Mean-field Symmetry
AbstractWe 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
2005
ISSN1098-0121
Volume71Issue:1Pages:-
Subject AreaPhysics
Indexed BySCI
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13915
CollectionSCI期刊论文
Corresponding AuthorGan, JY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
Recommended Citation
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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