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arXiv · 0808.1116

Mott Transition in the Hubbard Model on Checkerboard Lattice

Takuya Yoshioka·Akihisa Koga·Norio Kawakami
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Abstract

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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Takuya Yoshioka, Akihisa Koga, Norio Kawakami. 2008-08-09. Mott Transition in the Hubbard Model on Checkerboard Lattice. https://doi.org/10.1143/jpsj.77.104702

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