Abstract: The triangular-lattice Fermi-Hubbard model has been extensively investigated in the literature due to its connection to chiral spin states and unconventional superconductivity. Previous simulations of the ground state of the doped system rely on quasi-one-dimensional lattices where true long-range order is forbidden. Here, I will talk about the simulation of a 12x12 triangular lattice using state-of-the-art Auxiliary-Field Quantum Monte Carlo. Upon doping a non-magnetic chiral spin state, evidence of chiral superconductivity is observed at filling n=5/6, which is supported by long-range order in Cooper-pair correlation and a finite value of the chiral order parameter.
Seminar: "Chiral superconductivity in the triangular-lattice Fermi-Hubbard model" by V. Zampronio, Utrecht University
13 dec 2022 ,14.30 - Venue: Aula Magna, Department of Physics and Astronomy