Flat-band ferromagnetism induced by off-site repulsions

被引：21

作者：

Arita, R ^{[1
]}

Shimoi, Y

Kuroki, K

Aoki, H

机构：

[1] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[2] Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.57.10609

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The density-matrix renormalization-group method is used to analyze how the nearest-neighbor repulsion V added to the Hubbard model on a one-dimensional triangular lattice and a railway-trestle (t-t') model will affect the electron-correlation-dominated ferromagnetism arising from the interference (frustration). The obtained phase diagram shows that there is a region in the small-t' side where the critical on-site repulsion above which the system becomes ferromagnetic is reduced when the off-site repulsion is introduced. [S0163-1829(98)01917-1].

引用

页码：10609 / 10612

页数：4

共 28 条

[1] Density-matrix renormalization-group study of the spin gap in a one-dimensional Hubbard model: Effect of the distant transfer and exchange coupling [J].