Hot-electron thermocouple and the diffusion thermopower of two-dimensional electrons in GaAs.
Hot-electron thermocouple and the diffusion thermopower of two-dimensional electrons in GaAs.
复制标题
热电子热电偶和 GaAs 中二维电子的扩散热电势。
作者：
W. Chickering;J. Eisenstein;J. Reno
在二维电子系统（2DES）中实现了一个简单的热电子热电偶，并用于测量二维电子系统在零磁场下的扩散热功率。这种热电子技术不需要2DES的微米尺度图形，对声子-阻力效应的敏感性远低于传统方法。我们的热功率计算结果与莫特的扩散热功率公式在温度高达约2k时很好地吻合。
A simple hot-electron thermocouple is realized in a two-dimensional electron system (2DES) and used to measure the diffusion thermopower of the 2DES at zero magnetic field. This hot-electron technique, which requires no micron-scale patterning of the 2DES, is much less sensitive than conventional methods to phonon-drag effects. Our thermopower results are in good agreement with the Mott formula for diffusion thermopower for temperatures up to T approximately 2 K.