中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Quantum tunneling and quantum-classical transitions in large spin systems

文献类型:期刊论文

作者Hu, BB ; Zhang, DG ; Li, BZ
刊名PHYSICAL REVIEW B
出版日期2000
卷号61期号:13页码:8639
关键词ESCAPE RATE MAGNETIZATION ANTIFERROMAGNETS COHERENCE MN12AC
ISSN号1098-0121
通讯作者Hu, BB (reprint author), Hong Kong Baptist Univ, Dept Phys, Hong Kong, Hong Kong, Peoples R China.
中文摘要We have studied quantum tunneling of large spins in a biaxial spin system and in a single-axial spin system with a transverse magnetic field. The asymptotically exact eigenvalues and eigenstates of the spin systems are obtained by solving the Mathieu equation. When the height 4q of energy barrier formed by the anisotropy and the magnetic field exceeds some critical values 4q(1T)(r), the ground states and the excited states split due to tunneling of large spins. We also have presented the phase diagram of these spin systems in the extremely weak spin-phonon coupling limit. The crossover from thermal to quantum regime is second order. With further decreasing temperature, the first-order phase transition occurs from a thermally-assisted resonant tunneling to thermal regime as q
收录类别SCI
语种英语
公开日期2013-09-24
源URL[http://ir.iphy.ac.cn/handle/311004/51760]  
专题物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
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GB/T 7714
Hu, BB,Zhang, DG,Li, BZ. Quantum tunneling and quantum-classical transitions in large spin systems[J]. PHYSICAL REVIEW B,2000,61(13):8639.
APA Hu, BB,Zhang, DG,&Li, BZ.(2000).Quantum tunneling and quantum-classical transitions in large spin systems.PHYSICAL REVIEW B,61(13),8639.
MLA Hu, BB,et al."Quantum tunneling and quantum-classical transitions in large spin systems".PHYSICAL REVIEW B 61.13(2000):8639.

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来源:物理研究所

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