Global phase diagram of D-wave superconductivity in the square-lattice <i>t-J</i> model.

ABSTRACT: The Hubbard and closely related t-J models are exciting platforms for unconventional superconductivity (SC). Through state-of-the-art density matrix renormalization group calculations using the grand canonical ensemble, we address open issues regarding the ground-state phase diagram of the extended t-J model on a square lattice in the parameter regime relevant to cuprate superconductors. On large 8-leg cylinders, we demonstrate that the pure t-J model with only nearest-neighbor hoppings and superexchange interactions, for a wide range of doping ([Formula: see text]), hosts robust d-wave superconductivity possibly coexisting with weak unidirectional pair density wave. Furthermore, a small next nearest neighbor hopping [Formula: see text] suppresses pair and charge densi

SUBMITTER: Chen F 

PROVIDER: S-EPMC11962510 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature