Macroscopic quantum coherence in small antiferromagnetic particles and quantum interference effects
文献类型：期刊论文
| 作者 | Nie, YH ; Zhang, YB ; Liang, JQ ; Muller-Kirsten, HJW ; Pu, FC |
| 刊名 | PHYSICA B
 |
| 出版日期 | 1999 |
| 卷号 | 270期号:1-2页码:95 |
| 关键词 | SMALL MAGNETIC PARTICLES FERROMAGNETIC PARTICLES SPIN PARTICLES ENERGY |
| ISSN号 | 0921-4526 |
| 通讯作者 | Muller-Kirsten, HJW: Univ Kaiserslautern, Dept Phys, Erwin Schrodinger Str,Gebaude 46, D-67653 Kaiserslautern, Germany. |
| 中文摘要 | Starting from the Hamiltonian of the uncompensated two-sublattice model of a small antiferromagnetic particle, we derive the effective Lagrangian of a biaxial antiferromagnetic particle in an external magnetic field with the help of spin-coherent-state path integrals. Two unequal level-shifts induced by tunneling through two types of barriers are obtained using the instanton method. The energy spectrum is found from Bloch theory regarding the periodic potential as a superlattice. The external magnetic field indeed removes Kramer's degeneracy, however, a new quenching of the energy splitting depending on the applied magnetic field is observed for both integer and half-integer spins due to the quantum interference between transitions through two types of barriers. (C) 1999 Elsevier Science B.V. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41109]  |
| 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 | Nie, YH,Zhang, YB,Liang, JQ,et al. Macroscopic quantum coherence in small antiferromagnetic particles and quantum interference effects[J]. PHYSICA B,1999,270(1-2):95. |
| APA | Nie, YH,Zhang, YB,Liang, JQ,Muller-Kirsten, HJW,&Pu, FC.(1999).Macroscopic quantum coherence in small antiferromagnetic particles and quantum interference effects.PHYSICA B,270(1-2),95. |
| MLA | Nie, YH,et al."Macroscopic quantum coherence in small antiferromagnetic particles and quantum interference effects".PHYSICA B 270.1-2(1999):95. |
入库方式： OAI收割
来源：物理研究所
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