Charge and spin transfer statistics in complex nanostructures

复杂纳米结构中的电荷和自旋转移统计

• 批准号: 159037256
• 负责人: Privatdozent Dr. Andreas Komnik
• 金额: --
• 依托单位: Institut für Theoretische Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/159037256?language=en
• 关键词: Charge; spin; transfer; statistics; complex

We intend to investigate the transport properties of nanostructures with complex topologiesunder non-equilibrium conditions in terms of the full counting statistics (aka FCS) of chargeand spin transport. The nanostructures in question are: (i) the single impurity Andersonmodel (SIAM) coupled to two electrodes, where the electron transport can occur not onlyby tunnelling over the impurity itself but also directly between the electrodes; (ii) doublequantum dot modelled by two SIAMs arranged in parallel. An inclusion of a magneticfield is expected to lead to Aharonov-Bohm physics in both set-ups allowing for a uniquecontrol of their transport characteristics. While in the set-up (i) we expect to observe distinctsignatures of the interplay of Fano–Anderson effect and interaction on the dot, in the setup(ii) the combined effect of interactions and Aharonov–Bohm physics may alter or evendestroy the balance between the single particle and electron pair processes known fromthe FCS of the conventional SIAM.

我们打算用电荷和自旋输运的全计数统计量(又名FCS)来研究具有复杂拓扑结构的纳米结构在非平衡条件下的输运性质。所讨论的纳米结构是：(I)耦合到两个电极的单杂质Anderson模型(SIAM)，其中电子传输不仅可以通过在杂质本身上隧穿发生，而且还可以直接在电极之间发生；(Ii)由平行排列的两个SIAM模拟的双量子点。磁场的加入有望在这两个装置中导致Aharonov-Bohm物理，从而允许对它们的传输特性进行独特的控制。虽然在(I)我们期望观察到Fano-Anderson效应和相互作用在点上相互作用的明显特征，但在(Ii)相互作用和Aharonov-Bohm物理的组合效应可能改变甚至破坏从常规SIAM的FCS中已知的单粒子和电子对过程之间的平衡。