Development of a high-performance display-analyzer

高性能显示分析仪的开发

• 批准号: 10102008
• 负责人: DAIMON Hiroshi
• 金额: $ 175.36万
• 依托单位: NARA INSTITUTE OF SCIENCE AND TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Specially Promoted Research
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10102008/
• 关键词: Electron energy band; Two-dimensional photoelectron spectroscopy; Angle resolved photoelectron spectroscopy; Surface; Surface conductivity; Band structure; Circularly polarized light; Stereo photograph; 光電子分光; 二次元表示型分析器; 高分解能分析器; エネルギーバンド; バンド

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

本研究的目的是将自行研制的“显示式球面镜分析仪”的能量分辨率提高到几十meV以下。利用这种分辨率，我们可以测量二维或一维材料和表面材料的二维完整能带映射。本研究揭示了高温超导体或新型表面电子导体的机理，完成了新型“显示式球镜分析仪”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。外球面的形状由球面变为非球面。外球改为陶瓷材料，在其表面开有许多凹槽，并在凹槽内填充软金属丝。陶瓷表面覆盖石墨薄膜，调整石墨薄膜的厚度使其电阻率达到几十千欧。将分析仪置于真空室中，用excit进行测试 ...更多信息 微波放电氦灯的电离源。目前正在进行这项测试，到目前为止，已经证实了两倍的能量分辨率。由于用于测试的电子束的光斑尺寸太大，不能获得更好的能量分辨率。聚焦镜系统正在研制中，其成果之一是“三维全谱带成像”，这也是本项目的目标之一。首次测量了三维能带结构，并在2001年国际真空紫外会议上获得最佳海报奖。的里雅斯特另一个成果是“能带结构的精确测量”。利用ScientaSES 2002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Alq_3分子在几种表面上的空能级。使用这种分析仪的一项发明是一种立体显微镜，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。少