Ferromagnetism on the frustrated lattices

Takashi Koretsune, Masao Ogata

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


The two-dimensional t-J model of the triangular and kagomé lattice is studied by high temperature expansions. The analyses of uniform susceptibility as well as the ground-state energy show strong evidence that ferromagnetic ground state exists in a wide region in the phase diagram with respect to electron density, n, and superexchange coupling, J, which is a different feature from the case of the square lattice. This result means that the low-density region, where the ferromagnetism is understood by Kanamori's mechanism, continues to Nagaoka's ferromagnetism in frustrated lattices. We also find the possibility of partial ferromagnetism in the low-density region of the triangular lattice.

Original languageEnglish
Pages (from-to)2437-2440
Number of pages4
JournalJournal of the Physical Society of Japan
Issue number10
Publication statusPublished - 2003 Oct


  • Ferromagnetism
  • Frustration
  • High temperature expansions
  • t-J model
  • Triangular lattice


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