抄録
To investigate the possibility of charge order and superconductivity in a doped two-dimensional triangular lattice, we study an extended Hubbard model with the variational Monte Carlo method. At n = 2/3, a commensurate filling for a triangular lattice, it is shown that the nearest-neighbor Coulomb interaction V induces honeycomb-type charge order and antiferromagnetic spin order at U ≳ 10t. We also discuss the possibility of superconductivity induced by charge fluctuation and the relation to the superconductivity in Na 0.35CoO2·1.3H2O and θ-type organic condoctors.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 2901-2904 |
| ページ数 | 4 |
| ジャーナル | Journal of the Physical Society of Japan |
| 巻 | 74 |
| 号 | 11 |
| DOI | |
| 出版ステータス | Published - 2005 11月 |
| 外部発表 | はい |
ASJC Scopus subject areas
- 物理学および天文学（全般）