Theory for Gossamer and Resonating Valence Bond Superconductivity

Details Theory for Gossamer and Resonating Valence Bond Superconductivity Theory for Gossamer and Resonating Valence Bond Superconductivity

2003-08-20

arxiv.org/abs/cond-mat/0308398v1

Phys. Rev. B 71, 014508 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 13 figures

Scientific paper

10.1103/PhysRevB.71.014508

We use an effective Hamiltonian for two-dimensional Hubbard model including an antiferromagnetic spin-spin coupling term to study recently proposed gossamer superconductivity. We formulate a renormalized mean field theory to approximately take into account the strong correlation effect in the partially projected Gutzwiller wavefucntions. At the half filled, there is a first order phase transition to separate a Mott insulator at large Coulomb repulsion U from a gossamer superconductor at small U. Away from the half filled,the Mott insulator is evolved into an resonating valence bond state, which is adiabatically connected to the gossamer superconductor.

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