Mott Transition in the Hubbard Model on Checkerboard Lattice

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.

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

References in corpus (3)

• Anisotropic pyrochlores and the global phase diagram of the checkerboard antiferromagnet
• Quantum-number projection in the path-integral renormalization group method
• Enhanced pairing in doped quantum magnets with frustrating hole motion

Cited by in corpus (1)

• Systematic Analysis of Frustration Effects in Anisotropic Checkerboard Lattice Hubbard Model