Spin Conductivity in Two-Dimensional Non-Collinear Antiferromagnets

被引：20

作者：

Kubo, Yurika ^{[1
]}

Kurihara, Susumu ^{[1
]}

机构：

[1] Waseda Univ, Dept Phys, Shinjuku Ku, Tokyo 1698555, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2013年 / 82卷 / 11期

关键词：

spin current; antiferromagnet; f-sum rule; Drude weight; linear response theory; SQUARE-LATTICE; MODEL;

D O I：

10.7566/JPSJ.82.113601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a method to derive the spin current operator for non-collinear Heisenberg antiferromagnets. We show that the spin conductivity calculated by the spectral representation with the spin current satisfies the f-sum rule. We also study the spin conductivity at T = 0 within spin wave theory. We show how the spin conductivity depends on the external magnetic field with changing magnon spectrum. We also find that the spin Drude weight vanishes for any external magnetic field at T = 0.

引用

页数：4

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