Superlight pairs in face-centred-cubic extended Hubbard models with strong Coulomb repulsion

Abstract

The majority of fulleride superconductors with unusually high transition-temperature to kinetic-energy ratios have a face-centred-cubic (FCC) structure. We demonstrate that, within extended Hubbard models with strong Coulomb repulsion, paired fermions in FCC lattices have qualitatively different properties than pairs in other three-dimensional cubic lattices. Our results show that strongly bound, light, and small pairs can be generated in FCC lattices across a wide range of the parameter space. We estimate that such pairs can Bose condense at high temperatures even if the lattice constant is large (as in the fullerides).

References in corpus (22)

• The density-matrix renormalization group in the age of matrix product states
• Quantum Cluster Theories
• Superconductivity in Fullerides
• Modeling the Unconventional Superconducting Properties of Expanded A${}_3$C${}_{60}$ Fullerides
• Anomalously Strong Near-Neighbor Attraction in Doped 1D Cuprate Chains
• Constant effective mass across the phase diagram of high-T${}_c$ cuprates
• Superlight small bipolarons in the presence of strong Coulomb repulsion
• Phonon-Mediated Long-Range Attractive Interaction in One-Dimensional Cuprates
• Universal properties of high temperature superconductors from real space pairing: t-J-U model and its quantitative comparison with experiment
• The Half-Filled One-Dimensional Extended Hubbard Model: Phase diagram and Thermodynamics
• Superconductivity in a Hubbard-Froehlich Model and in cuprates
• d-wave superconductivity in the presence of a near neighbor Coulomb repulsion
• Superlight small bipolarons
• Exact diagonalization solver for the extended dynamical mean-field theory
• Enhanced stability of bound pairs at nonzero lattice momenta
• Weyl points and topological nodal superfluids in a face-centered cubic optical lattice
• Light and stable triplet bipolarons on square and triangular lattices
• Data-Driven Dynamical Mean-Field Theory: an error-correction approach to solve the quantum many-body problem using machine learning
• A novel continuous time quantum Monte Carlo solver for dynamical mean field theory in the compact Legendre representation
• Mobile small bipolarons on a three-dimensional cubic lattice
• Stripe orders in the extended Hubbard model
• Fermion pairing in body-centered-cubic quantum simulators of extended Hubbard models

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