Study on the heavy-quasiparticle state in f-electron systems by extremely low-energy photoelectron spectroscopy

极低能光电子能谱研究f电子体系重准粒子态

• 批准号: 21740235
• 负责人: YAMASAKI Atsushi
• 金额: $ 2.83万
• 依托单位: Konan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740235/
• 关键词: 光物性; 光電子分光; 強相関電子系; バルク電子状態

In order to do photoemission experiments for small specimens, the toroidal-mirror and aperture systems have been designed and installed into the home-built photoemission apparatus. In the results, the highest energy resolution of 5meV is achieved under the conditions, hv=8.5-40.8eV, T=10-300K, and the beam spot size φ=0.5-2 mm. The pseudo gap, which is larger than reported one so far, has been observed possibly due to the highly bulk-sensitive measurement. Furthermore, the 4f electronic structures of many strongly correlated compounds can be reproduced in the framework of the single impurity model.

为了对小样品进行光发射实验，设计了环形镜和孔径系统并将其安装到自制的光发射装置中。结果表明，在hv=8.5-40.8eV、T=10-300K、束斑尺寸φ=0.5-2 mm的条件下，最高能量分辨率为5meV。观察到的伪间隙比迄今为止报道的要大，可能是由于高度体敏感的测量所致。此外，许多强相关化合物的 4f 电子结构可以在单一杂质模型的框架中重现。