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

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

2006-04-26

arxiv.org/abs/cond-mat/0604609v2

Phys. Rev. B 74, 085117 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 5 figures

Scientific paper

10.1103/PhysRevB.74.085117

We employ dynamical mean field theory (DMFT) with a Quantum Monte Carlo (QMC) atomic solver to investigate the finite temperature Mott transition in the Hubbard model with the nearest neighbor hopping on a triangular lattice at half-filling. We estimate the value of the critical interaction to be $U_c=12.0 \pm 0.5$ 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 (DQMC) and a discussion of the advantages and limitations of both methods.

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