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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：物理研究所
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