On the theory of superconductivity in the extended Hubbard model: Spin-fluctuation pairing
arXiv:1301.4347 · doi:10.1140/epjb/e2013-31157-6
Abstract
A microscopic theory of superconductivity in the extended Hubbard model which takes into account the intersite Coulomb repulsion and electron-phonon interaction is developed in the limit of strong correlations. The Dyson equation for normal and pair Green functions expressed in terms of the Hubbard operators is derived. The self-energy is obtained in the noncrossing approximation. In the normal state, antiferromagnetic short-range correlations result in the electronic spectrum with a narrow bandwidth. We calculate superconducting Tc by taking into account the pairing mediated by charge and spin fluctuations and phonons. We found the d-wave pairing with high-Tc mediated by spin fluctuations induced by the strong kinematic interaction for the Hubbard operators. Contributions to the d-wave pairing coming from the intersite Coulomb repulsion and phonons turned out to be small.
17 pages, 13 figures
References in corpus (13)
- Lattice symmetry breaking in cuprate superconductors: Stripes, nematics, and superconductivity
- Superconductivity in the repulsive Hubbard model: an asymptotically exact weak-coupling solution
- Strength of the Spin-Fluctuation-Mediated Pairing Interaction in a High-Temperature Superconductor
- Strongly Correlated Superconductivity: a plaquette Dynamical mean field theory study
- Gap anisotropy and universal pairing scale in a spin fluctuation model for cuprates
- Non-Perturbative Treatment of Charge and Spin Fluctuations in the Two-Dimensional Extended Hubbard Model: Extended Two-Particle Self-Consistent Approach
- Underdoped cuprates phenomenology in the 2D Hubbard model within COM(SCBA)
- An ARPES view on the high-Tc problem: phonons vs spin-fluctuations
- Optimal T of cuprates: role of screening and reservoir layers
- Antiferromagnetic Ising Model on Inverse Perovskite Lattice
- Optical and dc conductivities of cuprates: Spin-fluctuation scattering in the t-J model
- The isotope effect in the Hubbard model with local phonons
- Rigorous derivation of the mean field Green functions of the two-band Hubbard model of superconductivity
Cited by in corpus (9)
- Spin fluctuations and high-temperature superconductivity in cuprates
- The Kohn-Luttinger effect and anomalous pairing in new superconducting systems and graphene
- Fidelity Study of Superconductivity in Extended Hubbard Models
- CDMFT+HFD : an extension of dynamical mean field theory for nonlocal interactions applied to the single band extended Hubbard model
- Superconductivity of strongly correlated electrons on the honeycomb lattice
- Electronic spectrum and superconductivity in the extended t-J-V model
- Microscopic theory of high-temperature superconductivity in strongly correlated electronic systems
- Pseudogap in the lightly hole-doped triangular-lattice moiré Hubbard model
- On non-canonical degrees of freedom