Periodic instanton calculations of quantum-classical transitions in spin systems
文献类型：期刊论文
| 作者 | Zhang, YB ; Nie, YH ; Kou, SP ; Wang, XB ; Liang, JQ ; Pu, FK |
| 刊名 | CHINESE PHYSICS LETTERS
 |
| 出版日期 | 1998 |
| 卷号 | 15期号:9页码:683 |
| 关键词 | MAGNETIZATION |
| ISSN号 | 0256-307X |
| 通讯作者 | Zhang, YB (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China. |
| 中文摘要 | The quantum-classical transitions of the escape rates in the molecular magnet Mn12Ac and a biaxial anisotropic ferromagnetic spin model are investigated by applying the periodic instanton method. The effective free energies are expanded around the top of the potential barrier in analogy to the Landau theory of phase transitions. We show that the first-order transitions occur below the critical external magnetic field h(x) = 1/4 for Mn12Ac and beyond the critical anisotropy constant ratio lambda = 1/2 for the biaxial ferromagnetic grains, which is in Good agreement with earlier studies. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/50674]  |
| 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 | Zhang, YB,Nie, YH,Kou, SP,et al. Periodic instanton calculations of quantum-classical transitions in spin systems[J]. CHINESE PHYSICS LETTERS,1998,15(9):683. |
| APA | Zhang, YB,Nie, YH,Kou, SP,Wang, XB,Liang, JQ,&Pu, FK.(1998).Periodic instanton calculations of quantum-classical transitions in spin systems.CHINESE PHYSICS LETTERS,15(9),683. |
| MLA | Zhang, YB,et al."Periodic instanton calculations of quantum-classical transitions in spin systems".CHINESE PHYSICS LETTERS 15.9(1998):683. |
入库方式： OAI收割
来源：物理研究所
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