| The persistent current in an Aharonov－Bohm ring with a side-coupled quantum dot |
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| 引用本文： | 周波,吴绍全,孙威立,周晓林.The persistent current in an Aharonov－Bohm ring with a side-coupled quantum dot[J].中国物理 B,2004,13(2):225-228. |
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| 作者姓名： | 周波 吴绍全 孙威立 周晓林 |
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| 作者单位： | Department of Physics, Sichuan Normal University, Chengdu 610066, China |
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| 摘 要： | We have investigated the persistent current in a mesoscopic ring with a side-coupled quantum dot. The problems are probed by using the one-impurity Anderson Hamiltonian and are treated with the slave boson mean field theory. It is shown that the persistent current in this system has the spin fluctuations, and the charge transfers between the two subsystems are suppressed in the limit of Δ/T_K^0《1. The minimum value of the persistent current for ξ_K/L=5 of the odd parity system provides an opportunity to detect the Kondo screening cloud.
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| 关 键 词： | 量子点 稳定流 Aharonov-Bohm回路 电荷传输 Kondo效应 固体物理 |
| 收稿时间： | 2003-03-21 |
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