Enhancing $d$-wave superconductivity with nearest-neighbor attraction of extended Hubbard model

Abstract

Motivated by the recent discovery of the anomalously nearest-neighbor attraction arising from the electron-phonon coupling, we quantitatively investigate the enhancing effects of this additional attractive channel on the $d$-wave SC based on dynamic cluster quantum Monte Carlo calculations of doped two-dimensional extended Hubbard model with nearest-neighbor attraction $-V$. Focusing on the range of $0<-V/t\le 2$, our simulations indicate that the dynamics of $d$-wave projected pairing interaction is attractive at all frequencies and increases with $|V|$. Moreover, turning on $-V$ attraction enhances the $(\pi ,\pi )$ spin fluctuations but only enhances (suppresses) the charge fluctuations for small (large) momentum transfer. Thus, at $V/t=-1$ relevant to ``holon folding branch'', the charge fluctuations are insufficient to compete with $d$-wave pairing interaction strengthened by enhanced spin fluctuations. Our work suggest the underlying rich interplay between the spin and charge fluctuations in giving rise to the superconducting properties.

6 pages, 4 figures. To appear in PRB

References in corpus (9)

• Continuous-time auxiliary field Monte Carlo for quantum impurity models
• Strongly Correlated Superconductivity: a plaquette Dynamical mean field theory study
• Anomalously Strong Near-Neighbor Attraction in Doped 1D Cuprate Chains
• Sub-matrix updates for the Continuous-Time Auxiliary Field algorithm
• Phonon-Mediated Long-Range Attractive Interaction in One-Dimensional Cuprates
• Charge order and antiferromagnetism in the extended Hubbard model
• Antagonistic effects of nearest-neighbor repulsion on the superconducting pairing dynamics in the doped Mott insulator regime
• Fidelity Study of Superconductivity in Extended Hubbard Models
• Thermodynamics of the metal-insulator transition in the extended Hubbard model

Cited by in corpus (22)

• Enhanced superconductivity by near-neighbor attraction in the doped Hubbard model
• Spin-Triplet Pairing Induced by Near-Neighbor Attraction in the Cuprate Chain
• Determinant quantum Monte Carlo for the half-filled Hubbard model with nonlocal density-density interactions
• Robust superconducting correlation against inter-site interactions in the extended two-leg Hubbard ladder
• Revisiting superconductivity in the extended one-band Hubbard model: pairing via spin and charge fluctuations
• Beyond-Hubbard pairing in a cuprate ladder
• Signatures of the Attractive Interaction in Spin Spectra of One-dimensional Cuprate Chains
• Phase Diagram of the Square-Lattice $t$-$J$-$V$ Model for Electron-Doped Cuprates
• Exploring High-Temperature Superconductivity in the Extended Hubbard Model with Antiferromagnetic Tendencies
• Superconducting fluctuations and charge-4$e$ plaquette state at strong coupling
• Effective enhancement of the electron-phonon coupling driven by nonperturbative electronic density fluctuations
• Stable pair liquid phase in fermionic systems
• Collective excitations in competing phases in two and three dimensions
• Tuning competition between charge order and superconductivity in the square-lattice $t$-$t^{\prime }$-$J$ model
• Mean Field Study of Superconductivity in the Square Lattice $t$-$J$ Model with Three-Site Hopping
• Charge-Density-Wave State in Extremely Overdoped Cuprates Driven by Phonons
• Enhanced superconductivity via layer differentiation in trilayer Hubbard model
• Pairing phase diagram for electron-doped cuprates in the square-lattice $t-U-V$ Hubbard model
• Theory of ab initio downfolding with arbitrary range electron-phonon coupling
• Interfacial Polarons Driven by Charge Transfer In WSe2/Cuprate Superconductor Systems
• Observation of correlated plasmons in low-valence nickelates
• Interfacial Strain Modulated Correlated Plasmons in La1.85Sr0.15CuO4 and Their Role in High-temperature Superconductivity