| 点内库仑相互作用对三量子点系统输运性质的影响 |
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| 引用本文： | 琚鑫,郭健宏.点内库仑相互作用对三量子点系统输运性质的影响[J].首都师范大学学报(自然科学版),2011,32(2):8-16. |
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| 作者姓名： | 琚鑫 郭健宏 |
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| 作者单位： | 首都师范大学物理系理论物理中心,北京,100048 |
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| 基金项目： | 北京市优秀人才资助项目(批准号:005400602); 首都师范大学研究生创新基金资助的课题 |
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| 摘 要： | 本文利用非平衡格林函数运动方程方法,研究了与两个电极耦合在一起的三耦合量子点系统中,点内部的库仑关联或阻塞与点间的耦合强度对体系输运性质,即对系统微分电导和系统态密度的影响.通过理论计算发现,由于量子点上的局域态密度的不同从而导致系统微分电导或隧穿性质的不同,会开启新的Kondo输运通道,也会增强一些原有的输运通道.
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| 关 键 词： | 量子点 非平衡格林函数 运动方程 局域态密度 微分电导 |
Influence of Interdot Coulomb-Correlation to Properties of Electronic Transport through Coupled for Quantum-Dot System |
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| Ju Xin,Guo Jianhong.Influence of Interdot Coulomb-Correlation to Properties of Electronic Transport through Coupled for Quantum-Dot System[J].Journal of Capital Normal University(Natural Science Edition),2011,32(2):8-16. |
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| Authors: | Ju Xin Guo Jianhong |
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| Institution: | Ju Xin Guo Jianhong(Center of Theoretical Physics,Department of Physics,Capital Normal University,Beijing 100048) |
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| Abstract: | We studied a quantum-dots system which is coupled to two leads using the method of equation of motion of nonequilibrium Green’s function.We found that the Coulomb correlation interdot and coupling strength can influence the transport properties,such as differential conductivity and local density of state,through such a triple quantum-dots system.Theoretically,there will be some new Kondo channel for transport and the inherent ones will be increased. |
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| Keywords: | Quantum Dot Nonequilibrium Green’s Function Equation of Motion Local Density of State Differential Conductance |
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