Pairing correlation of the Kagome-lattice Hubbard model with the nearest-neighbor interaction

Abstract A recently discovered family of Kagome lattice materials, A V 3 Sb 5 ( A = K, Rb, Cs), has attracted great interest, especially in the debate over its dominant superconducting pairing symmetry. To explore this issue, we study the superconducting pairing behavior within the Kagome-Hubbard model through the constrained path Monte Carlo method. It is found that doping around the Dirac point generates a dominant nextnearest-neighbour- d pairing symmetry driven by on-site Coulomb interaction U . However, when considering the nearest-neighbor interaction V , it may induce nearest-neighbor- p pairing to become the preferred pairing symmetry. Our results provide useful information to identify the dominant superconducting pairing symmetry in AV 3 Sb 5 family.