Nonmagnetic Insulating States near the Mott Transitions on Lattices with Geometrical Frustration and Implications for κ-(ET)2Cu 2(CN)3

Hidekazu Morita, Shinji Watanabe, Masatoshi Imada

Research output: Contribution to journalArticle

220 Citations (Scopus)

Abstract

We study phase diagrams of the Hubbard model on anisotropic triangular lattices, which also represents a model for κ-type BEDT-TTF compounds. In contrast with mean-field predictions, path-integral renormalization group calculations show a universal presence of a nonmagnetic insulator sandwiched by an antiferromagnetic insulator and paramagnetic metals. The nonmagnetic phase does not show simple translational symmetry breakings such as flux phases, implying a genuine Mott insulator. We discuss possible relevance to the nonmagnetic insulating phase found in κ-(ET)2Cu 2(CN)3.

Original languageEnglish
Pages (from-to)2109-2112
Number of pages4
JournalJournal of the Physical Society of Japan
Volume71
Issue number9
DOIs
Publication statusPublished - 2002 Sep 1
Externally publishedYes

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Keywords

  • Antiferromagnetic transition
  • Bandwidth control
  • BEDT-TTF compounds
  • Mott insulator
  • Mott transition
  • Nonmagnetic insulator
  • Triangular lattice

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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