LANDAUER FORMULA FOR THE CURRENT THROUGH AN INTERACTING ELECTRON REGION
LANDAUER FORMULA FOR THE CURRENT THROUGH AN INTERACTING ELECTRON REGION
复制标题
DOI：
10.1103/physrevlett.68.2512
复制
发表时间：
1992-04-20
影响因子：
8.6
通讯作者：
WINGREEN, NS
中科院分区：
文献类型：
--
作者：
MEIR, Y;WINGREEN, NS
利用非平衡Keldysh公式，导出了通过相互作用电子区域的电流的Landauer公式。更详细地研究了与左右导联成比例耦合的情况，其中公式采用了特别简单的形式。讨论了相互作用在电流中产生新效应的两个具体例子：在近藤区域，预测了增强的电导，而在分数量子霍尔区，预测了通过量子点的抑制的电导。
A Landauer formula for the current through a region of interacting electrons is derived using the nonequilibrium Keldysh formalism. The case of proportionate coupling to the left and right leads, where the formula takes an especially simple form, is studied in more detail. Two particular examples where interactions give rise to novel effects in the current are discussed: In the Kondo regime, an enhanced conductance is predicted, while a suppressed conductance is predicted for tunneling through a quantum dot in the fractional quantum Hall regime.