Mott Transition in the Hubbard Model on Checkerboard Lattice
arXiv:0808.1116 · doi:10.1143/JPSJ.77.104702
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 (4)
- Gapless quantum spin liquid, stripe and antiferromagnetic phases in frustrated Hubbard models in two dimensions
- 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 (4)
- Systematic Analysis of Frustration Effects in Anisotropic Checkerboard Lattice Hubbard Model
- Dimensional Reduction and Odd-Frequency Pairing of the Checkerboard-Lattice Hubbard Model at 1/4-Filling
- Strong ferromagnetic fluctuations in a doped checkerboard lattice
- Magnetic Order and Mott Transition on the Checkerboard Lattice