抄録
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.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 2557-2560 |
| ページ数 | 4 |
| ジャーナル | journal of the physical society of japan |
| 巻 | 62 |
| 号 | 8 |
| DOI | |
| 出版ステータス | Published - 1993 1月 1 |
| 外部発表 | はい |
ASJC Scopus subject areas
- 物理学および天文学（全般）