We investigate a magnetic transition in the half-filled Hubbard model on the triangular lattice. By making use of the path-integral renormalization group (PIRG) method with a spin-rotated frame, we calculate the ground state energy and charge/spin correlation functions for a cluster with 36 sites. We find that as the Hubbard interaction is varied, a first-order magnetic phase transition occurs from a nonmagnetic insulating phase to a magnetically ordered phase with a 1203 spin configuration.
- Geometrical frustration
- Hubbard model
- Triangular lattice
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering