Increasing d-wave superconductivity by on site repulsion

Abstract

We study by Variational Monte Carlo an extended Hubbard model away from half filled band density which contains two competing nearest-neighbor interactions: a superexchange $J$ favoring d-wave superconductivity and a repulsion $V$ opposing against it. We find that the on-site repulsion $U$ effectively enhances the strength of $J$ meanwhile suppressing that of $V$, thus favoring superconductivity. This result shows that attractions which do not involve charge fluctuations are very well equipped against strong electron-electron repulsion so much to get advantage from it.

4 pages, 3 figures

References in corpus (1)

• Strongly Correlated Superconductivity

Cited by in corpus (25)

• Resonating valence bonds and mean-field d-wave superconductivity in graphite
• The Hubbard model within the equations of motion approach
• Origin of high-Tc superconductivity in doped Hubbard models and their extensions: Roles of uniform charge fluctuations
• Robust dx2-y2 pairing symmetry in high-temperature superconductors
• Resilience of d-wave superconductivity to nearest-neighbor repulsion
• On the theory of superconductivity in the extended Hubbard model: Spin-fluctuation pairing
• d-wave superconductivity in the presence of a near neighbor Coulomb repulsion
• Many-body renormalisation of forces in f-electron materials
• Properties of Gutzwiller wave-functions for multi-band models
• Antagonistic effects of nearest-neighbor repulsion on the superconducting pairing dynamics in the doped Mott insulator regime
• Spin fluctuations and high-temperature superconductivity in cuprates
• Fourier-Transformed Local Density of States and Tunneling into a $D$-Wave Superconductor with Bosonic Modes
• Calculating DMFT forces in ab-initio ultrasoft pseudopotential formalism
• Revisiting superconductivity in the extended one-band Hubbard model: pairing via spin and charge fluctuations
• Time-dependent Gutzwiller theory of pairing fluctuations in the Hubbard model
• Pseudogap, competing order and coexistence of staggered flux and d-wave pairing in high-temperature superconductors
• Exact solution of the 1D Hubbard model with NN and NNN interactions in the narrow-band limit
• U-J Synergy Effect for the High Tc Superconductors
• Strongly Correlated Superconductivity rising from a Pseudo-gap Metal
• Quantum fluctuations, pseudogap, and the T=0 superfluid density in strongly correlated d-wave superconductors
• Electronic spectrum and superconductivity in the extended t-J-V model
• Microscopic theory of high-temperature superconductivity in strongly correlated electronic systems
• Enhancement of maximum superconducting temperature by applying pressure and reducing the charge transfer gap
• One-band Hubbard model with hopping asymmetry and the effective theory at finite U: Phase diagram and metal-insulator transition
• Robust $s\pm$ Superconductivity in a Two-Band Hubbard-Fr{ö}hlich Model of Alkali Doped Organics