Quantum-classical crossover in nanomagnetic systems

被引：2

作者：

Kim, GH ^{[1
]}

机构：

[1] Sejong UNiv, Dept Phys, Seoul 143747, South Korea

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2002年 / 14卷 / 04期

关键词：

D O I：

10.1088/0953-8984/14/4/317

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Using the nonlinear perturbation method, we study a crossover between quantum and classical regimes for the escape rate. We present a general formula for determining whether the escape rate changes smoothly around the crossover temperature or not. Applying it to tetragonal and hexagonal symmetries, it is found that the crossover is mostly of first order.

引用

页码：849 / 856

页数：8

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