Mott Transition in the Hubbard Model on Checkerboard Lattice

Details Mott Transition in the Hubbard Model on Checkerboard Lattice Mott Transition in the Hubbard Model on Checkerboard Lattice

2008-08-08

arxiv.org/abs/0808.1116v2

Physics

Condensed Matter

Strongly Correlated Electrons

7pages, 9figures, accepted for publication in J. Phys. Soc. Jpn

Scientific paper

10.1143/JPSJ.77.104702

We investigate the bandwidth-controlled Mott transition in the Hubbard model on the checkerboard lattice at half filling using the path-integral renormalization group (PIRG) method. It is demonstrated that the system undergoes a first-order phase transition to the plaquette-singlet insulating phase at a finite Hubbard interaction. This conclusion is drawn via a detailed analysis of the spin and charge correlations around the phase transition point by means of the PIRG method aided with a new iteration scheme introduced in this paper.

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