Spatially Indirect Exciton Condensation in Two-Dimensional Strongly Correlated Semimetals
The study investigates indirect exciton condensation in 2D triangular lattices using a two- and three-orbital Hubbard model with strong Coulomb interactions (U and V). Results show that on-site repulsion U strongly suppresses the condensation temperature Tc, especially at high carrier densities, contrasting with the U=0 case. Competition between different pairing channels in the three-orbital model further reduces Tc, revealing an orbital-selective pairing state.