| Persistent Current in a Mesoscopic Ring Side-Attached with a Quantum Dot |
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| 引用本文： | 周波 谌雄文 李铁 聂喻梅 吴绍全. Persistent Current in a Mesoscopic Ring Side-Attached with a Quantum Dot[J]. 中国物理快报, 2005, 22(11): 2918-2921 |
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| 作者姓名： | 周波 谌雄文 李铁 聂喻梅 吴绍全 |
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| 作者单位： | [1]School of Mathematics and Physics, Chongqing Institute of Technology, Chongqing 400050 [2]Department of Physics, College of Huaihua, Huaihua 418008 [3]Department of Physics, Sichuan Normal University, Chengdu 610066 |
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| 基金项目： | Supported by the Scientific Research Fund of Chongqing Institute of Technology under Grant No 2004ZD78. |
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| 摘 要： | We theoretically investigate properties of the ground state of a closed dot-ring system with a magnetic flux in the Kondo regime by means of a tight-banding Anderson Hamiltonian, using the Slave-Boson mean-field approach. The persistent current shows interesting dependences on the parity and on the size of the system. The signature of Kondo resonance at ζk/L = 0.15 is expected to be observed experimentally in the future. With the intensity of the coupling tD changes from weak to strong, the properties of the system changes largely, which are different from the in-line one because of the attached dot.
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| 关 键 词： | 量子点 点环系统 Hamiltonian函数 稳定性 |
| 收稿时间： | 2005-05-14 |
| 修稿时间： | 2005-05-14 |
Persistent Current in a Mesoscopic Ring Side-Attached with a Quantum Dot |
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| ZHOU Bo, CHEN Xiong-Wen, LI Tie, NIE Yu-Mei, WU Shao-Quan. Persistent Current in a Mesoscopic Ring Side-Attached with a Quantum Dot[J]. Chinese Physics Letters, 2005, 22(11): 2918-2921 |
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| Authors: | ZHOU Bo CHEN Xiong-Wen LI Tie NIE Yu-Mei WU Shao-Quan |
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