| Nonadiabatic Geometric Phase and Induced Persistent Current in Mesoscopic Square Circuit with Tilted Magnetic Field at Edges |
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| 作者姓名： | 钟艳明 熊诗杰 |
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| 作者单位： | National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093 |
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| 基金项目： | Supported by the National Basic Research Programme of China under Grant Nos 2005CB623605 and 2006CB921803, and the National Natural Science Foundation of China under Grant Nos 10474033 and 60676056. |
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| 摘 要： |
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| 关 键 词： | 非绝热几何相位 交流电 电路 磁性 |
| 收稿时间： | 2007-3-29 |
| 修稿时间： | 2007-03-29 |
Nonadiabatic Geometric Phase and Induced Persistent Current in Mesoscopic Square Circuit with Tilted Magnetic Field at Edges |
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| ZHONG Yan-Ming,XIONG Shi-Jie.Nonadiabatic Geometric Phase and Induced Persistent Current in Mesoscopic Square Circuit with Tilted Magnetic Field at Edges[J].Chinese Physics Letters,2007,24(9):2650-2653. |
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| Authors: | ZHONG Yan-Ming XIONG Shi-Jie |
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| Affiliation: | National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093 |
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| Abstract: | We investigate the geometric phase produced by nonadiabatic transition of spin states at corners of mesoscopic square circuit with tilted magnetic field at its edges, From the Schrodlnger equation, the transitions of electron spin state at corners are described by the transfer matrices. The eigenenergies and eigenstates are obtained from the cyclic condition and the multiplying of the transfer matrices. We show that there exist persistent charge and spin currents in such a system due to the lift of degeneracy between the opposite moving directions in the presence of the tilted magnetic field. The dependences of eigenenergies, geometric phase, charge and spin persistent currents on the tilting angles of magnetic field are analysed. |
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| Keywords: | 71 55 Jv 72 15 Rn 71 23 -k 42 25 Bs |
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