Linear-response formulation for mesoscopic systems with arbitrary interactions.
Linear-response formulation for mesoscopic systems with arbitrary interactions.
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DOI：
10.1103/physrevb.46.9493
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发表时间：
1992-10
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影响因子：
--
通讯作者：
Datta
中科院分区：
文献类型：
--
作者：
Datta
本文从非平衡格林函数出发，导出了一个线性响应方程，该方程可用于计算由任意自能函数描述的介观系统中的电流。无论对自能采用何种近似，都能保证电流守恒。我们还得到了从终端j到终端i的传输tij的显式表达式，并给出了一个计算具有电子-声子相互作用的短单模电子波导tij的简单示例
In this paper we derive a linear-response equation starting from the nonequilibrium Green-function formalism that can be used to calculate the current in mesoscopic systems described by arbitrary self-energy functions. Current conservation is ensured regardless of the approximation used for the self-energy. We also obtain explicit expressions for the transmission T ij from terminal j to terminal i and present a simple illustrative example calculating T ij for a short single-moded electron waveguide with electron-phonon interactions