QUANTUM DYNAMICS AND TUNNELING OF DOMAIN-WALLS IN FERROMAGNETIC INSULATORS

被引：131

作者：

STAMP, PCE

机构：

[1] Department of Physics, University of British Columbia, Vancouver, V6T 2A6, BC

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.66.2802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

It is shown how large domain walls, containing greater-than-or-equal-to 10(10) spins, can behave as quantum objects at low temperatures. They move quantum diffusively, and exhibit macroscopic tunneling from defect pinning centers. The dissipation is calculated and shown to be very small; it does not involve the usual Caldeira-Leggett environmental couplings. The theory can also be used to treat smaller single-domain-wall behavior.

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页码：2802 / 2805

页数：4

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