Angle resolved photoelectron spectroscopy study of hidden order and magnetic states in uranium compounds

铀化合物中隐藏有序态和磁态的角分辨光电子能谱研究

• 批准号: 21740271
• 负责人: FUJIMORI Shin-ichi
• 金额: $ 2.25万
• 依托单位: Japan Atomic Energy Agency
• 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-21740271/
• 关键词: 強相関系; 光物性; 重い電子系; 隠れた秩序; ウラン化合物; 光電子分光; 放射光

The ordered states such as magnetism in uranium based compounds have been one of the central issues in condensed matter physics. Especially, the hidden order state observed in Uru_2Si_2 has been attracting much attention for more than 25 years. In the present study, we have performed angle-resolved photoelectron spectroscopy, which is a powerful tool to understand electronic structure of materials, to understand the origin of those ordered states. We have found that U 5f electrons, which are responsible for those ordered states, have an itinerant character. This is very important basis for the understanding of these ordered states.

铀基化合物中的磁性等有序态一直是凝聚态物理学的核心问题之一。特别是，在 Uru_2Si_2 中观察到的隐藏有序态在 25 年来一直备受关注。在本研究中，我们进行了角分辨光电子能谱，这是了解材料电子结构、了解这些有序态起源的有力工具。我们发现负责这些有序状态的 U 5f 电子具有流动特征。这是理解这些有序状态的非常重要的基础。