Systematic analysis of the Hubbard model on the checkerboard lattice

T. Yoshioka, A. Koga, N. Kawakami

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We study a geometrically frustrated Hubbard model on the checkerboard lattice with the nearest neighbor (t) and diagonal (t) hoppings. By using the path-integral renormalization group method, we calculate the double occupancy and the equal-time spin correlation to discuss the ground-state properties at half filling. It is found that the increase of the Coulomb interaction induces the first-order metal-insulator transition to the antiferromagnetically ordered phase for t / t = 0.2. On the other hand, when t / t = 1.0, magnetic correlations are suppressed, where the non-magnetic Mott insulator phase is stabilized in the strong coupling case.

Original languageEnglish
Pages (from-to)873-875
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 1
DOIs
Publication statusPublished - 2007 Mar 1
Externally publishedYes

Keywords

  • Checkerboard lattice
  • Geometrical frustration
  • Hubbard model

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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