Attraction versus repulsion between doublons or holons in Mott-Hubbard systems
arXiv:2304.03034 · doi:10.1007/s10773-023-05484-9
Abstract
For the Mott insulator state of the Fermi-Hubbard model in the strong-coupling limit, we study the interaction between quasi-particles in the form of doublons and holons. Comparing different methods -- the hierarchy of correlations, strong-coupling perturbation theory, and exact analytic solutions for the Hubbard tetramer -- we find an effective interaction between doublons and/or holons to linear order in the hopping strength which can display attractive as well as repulsive contributions, depending on the involved momenta. Finally, we speculate about the implications of our findings for high-temperature superconductivity.
References in corpus (6)
- Strongly Correlated Superconductivity: a plaquette Dynamical mean field theory study
- Solving nonequilibrium dynamical mean-field theory using matrix product states
- Strong pairing in mixed dimensional bilayer antiferromagnetic Mott insulators
- Pairing of holes by confining strings in antiferromagnets
- Environment-induced decay dynamics of anti-ferromagnetic order in Mott-Hubbard systems
- Spin-conserving Boltzmann theory for carriers and excitons in organic semiconductors