Effective mass divergence in the infinite-U Hubbard model

Takashi Koretsune, Masao Ogata

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


To clarify the property of Mott transition in the strong correlation limit, we investigate the infinite-U Hubbard model using high-temperature expansion method. The free energies in various lattices are obtained as a function of inverse temperature and electron density. If we assume the low temperature behavior as S ∝ T, we can extrapolate the series down to T = 0 with remarkable accuracy and find that the specific heat coefficient γ diverges with n → 1. Furthermore, it is revealed that the divergence is scaled as γ ∝ ( 1 - n )- x with x ∼ 1.7- 1.8, which is almost irrespective of lattice structure.

Original languageEnglish
Pages (from-to)323-324
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberSPEC. ISS.
Publication statusPublished - 2006 May 1
Externally publishedYes


  • Infinite-U Hubbard model
  • Mott transition

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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