抄録
The doping of a two-orbital chain with mobile S = 1/2 fermions and strong Hund's rule couplings stabilizing the S = 1 spins strongly depends on the presence of a level difference among these orbitals. Using density matrix renormalization group (DMRG) methods, we find a finite spin gap upon doping and dominant pairing correlations without level difference, whereas the presence of a level difference leads to dominant charge density wave (CDW) correlations with gapless spin-excitations. The string correlation function also shows qualitative differences between the two models.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 1946-1949 |
| ページ数 | 4 |
| ジャーナル | journal of the physical society of japan |
| 巻 | 69 |
| 号 | 7 |
| DOI | |
| 出版ステータス | Published - 2000 7月 |
| 外部発表 | はい |
ASJC Scopus subject areas
- 物理学および天文学（全般）