Quantum spin dynamics in mesoscopic magnets

被引：6
|
作者：
Chiolero, A [1 ]
Loss, D [1 ]
机构：
[1] Univ Basel, Dept Phys & Astron, CH-4056 Basel, Switzerland
来源：
PHYSICA E | 1997年 / 1卷 / 1-4期
关键词：
quantum spin dynamics;
D O I：
10.1016/S1386-9477(97)00062-3
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Molecular magnets present a new class of systems that can exhibit macroscopic quantum coherence. We show that magnetic fields can induce controllable tunnel barriers for the Neel vector in antiferromagnets such as the ferric wheel. The tunneling dynamics manifests itself in e.g. NMR resonances, the static magnetization or the specific heat. Numerical simulations confirm and complement the analytical results based on an extended non-linear sigma model. (C) 1997 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：292 / 296
页数：5
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