Quantum tunneling and phase transitions in spin systems with an applied magnetic field

被引：41
|
作者：
Lee, SY [1 ]
Muller-Kirsten, HJW
Park, DK
Zimmerschied, F
机构：
[1] Korea Univ, Dept Phys, Coll Sci, Seoul 136701, South Korea
[2] Univ Kaiserslautern, Dept Phys, D-67653 Kaiserslautern, Germany
[3] Kyung Nam Univ, Dept Phys, Masan, South Korea
来源：
PHYSICAL REVIEW B | 1998年 / 58卷 / 09期
关键词：
D O I：
10.1103/PhysRevB.58.5554
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Transitions from classical to quantum behavior in a spin system with two degenerate ground states separated by twin energy barriers which are asymmetric due to an applied magnetic field are investigated. It is shown that these transitions can be interpreted as first- or second-order phase transitions depending on the anisotropy and magnetic parameters defining the system in an effective Lagrangian description.
引用
收藏
页码：5554 / 5562
页数：9
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