Quasi-one-dimensional band in the t-J model

被引：2
|
作者：
Yamase, H [1 ]
Kohno, H
Fukuyama, H
机构：
[1] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 1168666, Japan
[2] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan
来源：
PHYSICA C | 2000年 / 341卷
关键词：
D O I：
10.1016/S0921-4534(00)00500-1
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study the two-dimensional (2d) t-J model in a mean filed approximation. Assuming uniform charge distribution, we find that the 2d t-J model has an instability toward forming a quasi-one-dimensional (q-1d) Fermi surface. This q-1d state competes with a d-wave pairing state, which overcomes the q-1d state for a realistic parameter region. However, we can show that the q-1d state coexists with the d-wave pairing state when we introduce a small (about 3%) spatial anisotropy in t and J in the original t-J model.
引用
收藏
页码：321 / 322
页数：2
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