SUPPRESSION OF TUNNELING BY INTERFERENCE IN HALF-INTEGER-SPIN PARTICLES

被引：288
|
作者：
LOSS, D
DIVINCENZO, DP
GRINSTEIN, G
机构：
[1] IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights
来源：
PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 22期
关键词：
D O I：
10.1103/PhysRevLett.69.3232
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Within a wide class of ferromagnetic and antiferromagnetic systems, quantum tunneling of magnetization direction is spin-parity dependent: it vanishes for magnetic particles with half-integer spin, but is allowed for integer spin. A coherent-state path-integral calculation shows that this topological effect results from interference between tunneling paths.
引用
收藏
页码：3232 / 3235
页数：4
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