Theoretical comparison of electron real‐space transfer in classical and quantum two‐dimensional heterostructure systems
Theoretical comparison of electron real‐space transfer in classical and quantum two‐dimensional heterostructure systems
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DOI：
10.1063/1.343055
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发表时间：
1989-02
影响因子：
3.2
通讯作者：
K. Brennan;D. H. Park
中科院分区：
文献类型：
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作者：
K. Brennan;D. H. Park
我们用系综蒙特卡罗模拟方法比较了不存在空间量子化效应的两种经典异质结系统和二维异质结系统中实空间转移对电子漂移速度的影响。对二维系统的计算是基于三角量子井系统中电子输运的第一原理公式，使用了一个专门为包括二维系统的基本物理而定制的系综蒙特卡罗程序。此外，我们还基于完整的系综蒙特卡罗模拟，对在异质界面上没有形成二维气体的经典系统的实空间迁移进行了分析。经典体系中的电子漂移速度大于本构块体材料中的电子漂移速度，这种漂移速度被从高迁移率材料向相邻的低迁移率材料的实空间转移或窄空间内的k空间转移所阻碍.
We present a comparison of the effect of real‐space transfer on the electron drift velocities in both classical heterostructure systems, those in which spatial quantization effects do not occur, and in two‐dimensional heterostructure systems using an ensemble Monte Carlo simulation. The calculations for the two‐dimensional system are based on a first‐principles formulation of electron transport in a triangular quantum well system using an ensemble Monte Carlo code tailored to include the basic physics of two‐dimensional systems. In addition, we present an analysis, again based on a complete ensemble Monte Carlo simulation, of real‐space transfer from classical systems, ones in which no two‐dimensional gas is formed at the heterointerface. Electron drift velocities within the classical system greater than that possible in the constitutive bulk materials are thwarted by either real‐space transfer out of the high mobility material into the adjacent low mobility material or k‐space transfer within the narrow ...