Electron spectroscopy of conduction electrons excited by visible light utilizing NEA surface
Electron spectroscopy of conduction electrons excited by visible light utilizing NEA surface
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利用 NEA 表面由可见光激发的传导电子的电子能谱
DOI：
10.1109/pvsc.2013.6744149
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
T. Ujihara
中科院分区：
文献类型：
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作者：
F. Ichihashi;D. Shimura;K. Nishitani;M. Kuwahara;T. Ito;S. Harada;M. Tagawa;T. Ujihara
本文提出了一种角分辨光电子能谱，用于观察负电子亲和势表面发射的传导电子。实际上，我们测量了GaAs体晶体中的传导电子，得到了在Γ点附近的电子色散。此外，我们还可以观察到由能量远大于带隙能量的光激发的超热电子。这些结果表明，我们提出的方法是最有力的工具之一的导带的评估方法。
In this paper we propose an angle-resolved photoemission spectroscopy to observe the conduction electrons emitted from a surface of negative electron affinity state. In actual, we have measured conduction electrons in a GaAs bulk crystal and obtained the electron dispersion around Γ point. In addition, we could also observe hot electrons excited by the light which energy was much larger than band gap energy. These results suggest that the method we proposed is one of the most powerful tools for the evaluation method of the conduction band.