MACROSCOPIC QUANTUM TUNNELING OF A DOMAIN-WALL IN A FERROMAGNETIC METAL

被引：1
|
作者：
TATARA, G
FUKUYAMA, H
机构：
[1] Department of Physics, University of Tokyo, Tokyo, 113
来源：
PHYSICA B | 1994年 / 194卷 / pt 1期
关键词：
Coulomb interaction - Dissipative effect - Domain wall - Hubbard model - Inverse fermi momentum - Macroscopic quantum tunneling - Ohmic dissipation - Stoner excitations characteristic;
D O I：
10.1016/0921-4526(94)90456-1
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The macroscopic quantum tunneling (MQT) of a planar domain wall in a ferromagnetic metal is studied based on the Hubbard model. The crucial difference from the case of the insulator is that the ohmic dissipation is present even at zero temperature due to the Stoner excitations characteristic of the electron system. The disipative effect is very large for a thin domain wall with width lambda comparable to the inverse fermi momentum, but is negligible for a thick domain wall.
引用
收藏
页码：253 / 254
页数：2
相关论文
共 50 条
12345