| Alternating-Current Conductivity for a Two-Channel Interacting Quantum Wire |
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| 作者姓名： | 彭德军 程芳 周光辉 |
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| 作者单位： | [1]Department of Physics, Hunan Normal University, Changsha 410081 [2]International Genter for Materials Physics, Ghinese Academy of Sciences, Shenyang 110015 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10574042, and the Hunan Provincial Natural Science Foundation of China under Grant No 06JJ2097. |
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| 摘 要： |
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| 关 键 词： | 交互电流 传导性 量子理论 金属丝 |
| 收稿时间： | 2006-9-21 |
| 修稿时间： | 2006-09-21 |
Alternating-Current Conductivity for a Two-Channel Interacting Quantum Wire |
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| PENG De-Jun,CHENG Fang,ZHOU Guang-Hui.Alternating-Current Conductivity for a Two-Channel Interacting Quantum Wire[J].Chinese Physics Letters,2007,24(2):520-523. |
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| Authors: | PENG De-Jun CHENG Fang ZHOU Guang-Hui |
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| Affiliation: | 1Department of Physics, Hunan Normal University, Changsha 410081; 2international Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015 |
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| Abstract: | We investigate theoretically the ac conductivity of a dean two-channel spinless quantum wire in the presence of both short-ranged intra- and inter-channel electron-electron interactions. In the Luttinger-liquid regime, we formulize the action functional of the system with an external time-varying electric field. The obtained expression of ac conductivity for the system within linear response theory is generally an oscillation function of the interaction strength, the driving frequency as well as the measured position in the wire. The numerical examples demonstrate that the amplitude of ac conductivity is renormalized by the both interactions, and the dc conductivity of the system with inter-channel interaction is smaller than that without inter-channel interaction. |
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| Keywords: | 71 10 Pm 73 23 -b 73 21 Hb |
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