Speaker
Description
Motivated by the experimental discovery of superconductivity in the trilayer Ruddlesden-Popper nickelate superconductor $\mathrm{La}_{4}\mathrm{Ni}_{3}\mathrm{O}_{10}$, we investigate the electronic structure for both the ambient pressure and high pressure phase. A two-orbital three-layer minimum model is constructed from maximally-localized Wannier orbitals of $\mathrm{Ni}$ $e_{g}$ character. Furthermore, systematic dynamical mean-field theory (DMFT) and quantum Monte Carlo (QMC) simulations are performed, where we confirm the picture of orbital-selective correlations and discuss the role of Hund’s coupling $J$, and its competition with the interlayer coupling $t_{\perp}$ and Hubbard $U$, in the description of the low-energy correlated electronic structure and pairing tendencies.