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

被引：291

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.

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页码：3232 / 3235

页数：4

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