Charge Mass Singularity in Two-Dimensional Hubbard Model

Nobuo Furukawa, Masatoshi Imada

Research output: Contribution to journalArticlepeer-review

76 Citations (Scopus)


Two-dimensional Hubbard model with both nearest- and next-nearest-neighbor transfers is studied. A singularity in the charge susceptibility at the Mott transition point is observed, leading to the anomaly of the charge mass mx in the form mtoz\Sr\where S is the doping concentration. The singularity is similar to that in the case without the next-nearest-neighbor transfer. This indicates that the singularity in the charge mass is a universal nature of this model, irrespective of its band structure.

Original languageEnglish
Pages (from-to)2557-2560
Number of pages4
Journaljournal of the physical society of japan
Issue number8
Publication statusPublished - 1993 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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