抄録
Two dimensional coupled spin-fermion model as a model for high-Tc oxide is examined by using the perturbation method and the spin wave approximation in the weak Kondo coupling region. The logarithmic singularity appears in the fermion self energy. It is shown that one fermion doped into the Heisenberg spin system forms the self-trapped states of the fermion and spins. The doped many fermions remains localized as the self-trapped states below the critical fermion concentration. The relation to the Kondo effect is discussed. The relevance of our results to optical and photoemission experiments in high-Tc oxides is also discussed.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 1771-1791 |
| ページ数 | 21 |
| ジャーナル | journal of the physical society of japan |
| 巻 | 59 |
| 号 | 5 |
| DOI | |
| 出版ステータス | Published - 1990 1月 1 |
| 外部発表 | はい |
ASJC Scopus subject areas
- 物理学および天文学（全般）