Effective Landau theory for crossover from thermal hopping to quantum tunnelling

被引：1
|
作者：
Kou, SP [1 ]
Liang, JQ
Pu, FC
机构：
[1] Tsinghua Univ, Ctr Adv Study, Beijing 100084, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
[3] Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China
[4] Shanxi Univ, Dept Phys, Shanxi 030006, Peoples R China
[5] Guangzhou Normal Coll, Dept Phys, Guangzhou 510400, Peoples R China
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2001年 / 13卷 / 11期
关键词：
D O I：
10.1088/0953-8984/13/11/318
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
In this paper the decay rate is obtained accurately near the crossover temperature. Because of the strong fluctuations near the crossover temperature a method called the effective Landau theory beyond the Gaussian semiclassical approximation is developed. We find that in the crossover region the transition rate of the first-order transition changes much more sharply than that of the second-order one. For both cases there is no discontinuity of transition rate for any of the order derivatives.
引用
收藏
页码：2627 / 2638
页数：12
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