MAGNETIC-STRUCTURE OF DOPED ANTIFERROMAGNET

被引：4

作者：

MORI, H ^{[1
]}

HAMADA, M ^{[1
]}

机构：

[1] HIROSHIMA UNIV,DEPT MAT SCI,HIROSHIMA 724,JAPAN

来源：

PHYSICA B | 1994年 / 194卷 / pt 2期

关键词：

Antiferromagnet - Carrier hopping - Density fluctuations - Electron spins - Fermion - Hole density - Magnetic phase diagrams - Magnetic structure - Spin wave;

D O I：

10.1016/0921-4526(94)91222-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We investigated t-J and t-t'-J model, focusing on their magnetic structures in low but finite doping region. By rewriting hopping term, we obtain new forms of the models which show more explicitely an interaction between carrier hopping and spins. In t-J model, a spiral order appears upon doping and discontinuously changes to ferromagnetic order at a critical doping delta(c) = 3(1 + square-root 2)J/8t, although the spiral order is unstable against density fluctuations. With the next-nearest neighbor hopping t' being finite, antiferromagnetic phase occupies finite region in the vicinity of half-filling in the magnetic phase diagram.

引用

页码：1445 / 1446

页数：2