超高分辨率光电子能谱仪和超导电子态的直接观察

Ultrahigh-resolution photoemission spectrometer and direct observation of superconducting electrons

文章较系统地介绍了光电子能谱仪的基本原理和现有光电子能谱仪的问题.在此基础上介绍了激光超高分辨率光电子能谱仪的优点,它采用的是Nd:YVO4激光六次谐波输出作为激光光源.最后给出了使用这台分辨率达0.36meV的超高分辨率光电子能谱仪,在国际上首次直接观察到CeRu2化合物超导体在超导态时的电子聚集和超导能隙.

We review the basic principles and existing problems of the photoemission spectrometer （PES）, and then describe an ultrahigh - resolution PES using the 6th harmonic generation of an Nd：YVO4 laser as an optical source. With this new PES we successfully observed the superconducting electrons of CeRu2 for the first time directly with a record high resolution of 0.36meV.