Dynamical mean-field study of the Mott transition in the half-filled Hubbard model on a triangular lattice

We employ dynamical mean-field theory (DMFT) with a quantum Monte Carlo atomic solver to investigate the finite-temperature Mott transition in the Hubbard model with nearest-neighbor hopping on a triangular lattice at half-filling. We estimate the value of the critical interaction to be U_c=12.0±0.5 in units of the hopping amplitude t through the evolution of the magnetic moment, spectral function, internal energy, and specific heat as the interaction U and temperature T are varied. This work also presents a comparison between DMFT and finite-size determinant quantum Monte Carlo calculations and a discussion of the advantages and limitations of both methods.