| 含量子点的A-B环中的持续电流(PC)与环尺寸的关系 |
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| 引用本文： | 吴绍全,周波,贺达江.含量子点的A-B环中的持续电流(PC)与环尺寸的关系[J].四川师范大学学报(自然科学版),2004,27(2):176-179. |
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| 作者姓名： | 吴绍全 周波 贺达江 |
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| 作者单位： | 四川师范大学,物理系,四川,成都,610066 |
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| 基金项目： | 四川省基础研究基金资助项目，四川省教育厅重点科研基金资助项目 |
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| 摘 要： | 对处于磁场中的近藤体系的闭合点环系统，其基态性质用单一杂质安德森模型哈密顿量加以研究；该哈密顿量是用平均场理论Slave—Boson技术求解。结果表明：由磁场感应的电流与系统字称和环的尺寸大小有很大关系，通过理论研究得出一些新的结论并探讨了一些相关问题。
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| 关 键 词： | 近藤效应 尺寸依赖 持续电流 近藤屏蔽云 |
| 文章编号： | 1001-8395(2004)02-0176-04 |
| 修稿时间： | 2003年1月14日 |
Size Dependence of the Persistent Currents in an Aharonov-Bohm Ring with an in-line Quantum Dot |
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| WU Shao-quan,ZHOU Bo,HE Da-jiang.Size Dependence of the Persistent Currents in an Aharonov-Bohm Ring with an in-line Quantum Dot[J].Journal of Sichuan Normal University(Natural Science),2004,27(2):176-179. |
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| Authors: | WU Shao-quan ZHOU Bo HE Da-jiang |
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| Abstract: | The properties of the ground state of a closed dot-ring system with a magnetic flux in the Kondo regime are studied theoretically by means of a one-impurity Anderson Hamiltonian which is solved by means of the Slave-Boson mean-field theory.It is shown that the persistent current in this system induced by a magnetic flux depends sensitively on both the parity of this system and the size of the ring.Some new results are obtained and relevant underlying physics of this problem is discussed. |
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| Keywords: | Kondo effect Size dependence Persistent currents Kondo screening cloud |
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