Development of a high-performance display-analyzer

本研究的目的是将自行研制的“显示式球面反射镜分析仪”的能量分辨率提高到几十meV以下。利用这一分辨率，我们可以测量二维或一维材料和表面材料的二维完全带状映射。本研究揭示了高T_c超导体或新型表面电子导体的形成机理，并完成了新型“显示式球面反射镜分析仪”的研制。为了提高能量分辨率，障碍环的数量从20个增加到200个。外球的形状已经从球体变成了非球体。外球的材料已经改为陶瓷，在其表面制造了许多凹槽，并填充了软金属线。在陶瓷表面覆盖一层石墨薄膜，通过调节石墨薄膜的厚度使其电阻率达到几十千欧。将分析仪放入真空室，用EXIT…进行测试更多的微波放电氦灯的来源。这项测试正在进行中，到目前为止，已经确认了两倍于此的更好的能量分辨率。由于用于测试的电子束的光斑尺寸太大，无法达到更好的能量分辨率。聚焦镜系统正在研制中，其中一个成果是“三维全波段映射”，这也是本项目的目标之一。首次测量了三维能带结构，该作品在2001年国际真空紫外展上被评为最佳海报奖。的里雅斯特。另一个成果是“能带结构的精确测量”。利用SECNTA SES2002首次对重掺杂Si(111)表面的“空穴带”进行了精确测量。用激光测量了Alq3分子在几个表面上的空能级。使用这种分析器的一项发明是立体显微镜，它可以直接在屏幕上显示原子排列的立体照片。这项工作是由NHK的电视新闻宣布的。较少

The airn of this study is to improve the energy resolution of "Display-type Spherioal Mirror Analyzer" which was developed by ourselves to less than about several tens meV. With this resolution we can measure two-dimensional complete band mapping of two- or one-dimensional materials and surface materials. This study reveals the mechanism of high Tc superconductor or new surface electronic conductors.The construction of new "Display-type Spherieal Mirror Analyzer" has been completed. The number of obstacle rings has been increased from 20 to 200 in order to improve the energy resolution. The shape of outer sphere has been changed from sphere to non-sphere. The material of outer sphere has been changed to ceramics, on which surface many grooves were made and filled with soft metal wires. The surface of the ceramics were covered by graphite thin films, whose thickness was adjusted to make its resistivity several tens kilo ohm. The analyzer was put into vacuum chamber and tested with excit … More ation source of microwave discharge He lamp. This test is being made now, and two times better energy resolution has been confirmed until now. Because of too ge spot size of the electron beam being used for the test, the better energy resolution cannot be achieved. The focusing mirror system is being made.One outcome is "Three-dimensional complete band mapping", which is one aim of this project. A three-dimensional band structure has been measured for the first time, and this work was awarded as a best poster award in the international conference of Vacuum Ultra-Violet 2001. Trieste. Another outcome is "Precise measurement of band structure". Precise measurement of "hole band" has been made for the first time by using Scienta SES2002 on heavy doped Si(111) surface. The measurement of unoccupied level has been made using laser for Alq3 molecules on several surfaces. One invention using this analyzer is a stereomicrosoope, which can display stereo photographs of atomic arrangement directly on its screen. This work was announced by TV news of NHK. Less