SPATIAL EVOLUTION OF HOT-ELECTRON RELAXATION IN QUANTUM HALL CONDUCTORS
SPATIAL EVOLUTION OF HOT-ELECTRON RELAXATION IN QUANTUM HALL CONDUCTORS
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量子霍尔导体中热电子弛豫的空间演化
DOI：
10.1103/physrevb.58.r7536
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发表时间：
1998
影响因子：
3.7
通讯作者：
K. Eberl
中科院分区：
文献类型：
--
作者：
I. Kaya;G. Nachtwei;K. Klitzing;K. Eberl
我们分析了量子霍尔效应预击穿状态下热电子的能量弛豫。由一组周期性收缩产生的热电子被注入各种迁移率的二维电子系统（2DES）中，霍尔场低于击穿值。 2DES 的电阻率是作为距注入前沿距离的函数来测量的。结果与基于热电子激发和弛豫之间不平衡的计算进行了比较。推导出 0.3 至 3 μm 的能量弛豫长度，该长度随着迁移率的增加而增加，并且与平均自由程相当。
We have analyzed the energy relaxation of hot electrons in the prebreakdown regime of the quantum Hall effect. Hot electrons, generated by a periodic set of constrictions, are injected into two-dimensional electron systems (2DES’s) of various mobilities, with Hall fields below the breakdown value. The resistivity of the 2DES is measured as a function of the distance from the injection front. The results are compared with calculations on the basis of a nonequilibrium between the excitation and relaxation of hot electrons. Energy relaxation lengths from 0.3 to 3 μm were deduced, which increase with the mobility and are comparable to the mean free path.