Superconductivity in laser-excited correlated electron systems has attracted considerable interest due to reports of light-induced superconducting-like states. Here we explore the possibility of non-thermal superconducting order in strongly interacting multi-orbital Hubbard systems, using non-equilibrium dynamical mean field theory. We find that a staggered η-type superconducting phase can be realized on a bipartite lattice in the high photo-doping regime, if the effective temperature of the photo-carriers is sufficiently low. The η superconducting state is stabilized by Hund coupling - a positive Hund coupling favors orbital-singlet spin-triplet η pairing, whereas a negative Hund coupling stabilizes spin-singlet orbital-triplet η pairing.
@article{arxiv.2305.06760,
title = {Non-thermal superconductivity in photo-doped multi-orbital Hubbard systems},
author = {Sujay Ray and Yuta Murakami and Philipp Werner},
journal= {arXiv preprint arXiv:2305.06760},
year = {2024}
}