Mott transition in the Hubbard model on checkerboard lattice

Takuya Yoshioka; Akihisa Koga; Norio Kawakami

doi:10.1143/JPSJ.77.104702

Mott transition in the Hubbard model on checkerboard lattice

Takuya Yoshioka, Akihisa Koga, Norio Kawakami

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

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.

Original language	English
Article number	104702
Journal	journal of the physical society of japan
Volume	77
Issue number	10
DOIs	https://doi.org/10.1143/JPSJ.77.104702
Publication status	Published - 2008 Oct
Externally published	Yes

Keywords

Checkerboard lattice
Geometrical frustration
Hubbard model
Mott transition
Path integral renormalization group method (PIRG)

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.77.104702

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AU - Koga, Akihisa

AU - Kawakami, Norio

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N2 - 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.

AB - 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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KW - Geometrical frustration

KW - Hubbard model

KW - Mott transition

KW - Path integral renormalization group method (PIRG)

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Mott transition in the Hubbard model on checkerboard lattice

Abstract

Keywords

ASJC Scopus subject areas

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