Coulomb-modified equilibrium and nonequilibrium properties in a double quantum dot Aharonov-Bohm-Fano interference device
文献类型：期刊论文
| 作者 | W. J. Gong ; X. F. Xie ; G. Z. Wei |
| 刊名 | Journal of Applied Physics
 |
| 出版日期 | 2010 |
| 卷号 | 107期号:7 |
| 关键词 | electronic transport kondo resonance systems |
| ISSN号 | 0021-8979 |
| 中文摘要 | In this paper, the Coulomb-induced changes of electronic transport through a double quantum dot (QD) Aharonov-Bohm-Fano interferometer are discussed. For the linear-transport case, the variation of Coulomb interaction in the reference-channel QD can remarkably modify the sign of the Fano parameter, which leads to the change in Fano interference, including the increase or decrease in the symmetry of the Fano lineshape, as well as the inversion of the Fano lineshape. When both the QD levels are adjustable, the Coulomb-induced splitting of the reference channel induces the destruction of Fano interference; whereas two blurry Fano lineshapes may appear in the conductance spectra when the many-body effect in the resonant-channel QD is also considered. Interestingly, in the absence of magnetic field, when the different-strength electron interactions make one pair of QD levels of different channels the same, the corresponding resonant state becomes a vacuum state. As for the nonlinear electron transport, the Fano lineshapes emerge in the differential conductance spectra when the resonant-channel QD level is adjusted to the vicinity of the chemical potential of either lead, except for the case where it encounters the reference-channel QD level. The presented Coulomb interactions also play a nontrivial role in the appearance of the negative differential conductance. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3311641] |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31121]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | W. J. Gong,X. F. Xie,G. Z. Wei. Coulomb-modified equilibrium and nonequilibrium properties in a double quantum dot Aharonov-Bohm-Fano interference device[J]. Journal of Applied Physics,2010,107(7). |
| APA | W. J. Gong,X. F. Xie,&G. Z. Wei.(2010).Coulomb-modified equilibrium and nonequilibrium properties in a double quantum dot Aharonov-Bohm-Fano interference device.Journal of Applied Physics,107(7). |
| MLA | W. J. Gong,et al."Coulomb-modified equilibrium and nonequilibrium properties in a double quantum dot Aharonov-Bohm-Fano interference device".Journal of Applied Physics 107.7(2010). |
入库方式： OAI收割
来源：金属研究所
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