Two peer-approved experiments at SPring-8: the Fermi surface of Co-doped BaFe2As2 and the electron spin-density in the NbFe2 system

SPring-8 的两个同行认可的实验：共掺杂 BaFe2As2 的费米表面和 NbFe2 系统中的电子自旋密度

• 批准号: EP/H009140/1
• 负责人: Stephen Brian Dugdale
• 金额: $ 1.43万
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2009
• 资助国家: 英国
• 起止时间: 2009 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FH009140%2F1
• 关键词: Two; peer; approved; experiments; SPring

Superconductivity and magnetism are two fascinating phenomena which can occur in materials. Our understanding of the mechanisms responsible is based on a quantum mechanical description of how the electrons in the material are behaving. It is possible to study these electrons by scattering of x-rays off them, much in the same way as snooker balls are scattered by each other. However, we need a very intense source of x-rays, known as a synchrotron.We have been awarded experimental time at a synchrotron in Japan for two separate studies of the electronic properties of two different materials. In the first study on a superconductor, we will investigate a particular aspect of the electronic behaviour, looking for a characteristic surface known as the Fermi surface, which may be crucial to explaining why these particular materials superconduct in the manner in which they do. In the second study, we propose to look at the nature of the magnetism in a compound whose behaviour has been found to be rather unusual. It is hoped that by studying how the magnetism is distributed, it might tell us something about gaps in our understanding.

超导性和磁性是材料中两种迷人的现象。我们对相关机制的理解是基于对材料中电子行为的量子力学描述。通过X射线从这些电子上散射来研究这些电子是可能的，就像斯诺克球相互散射一样。然而，我们需要一个非常强的X射线源，称为同步加速器。我们已经获得了在日本同步加速器的实验时间，对两种不同材料的电子特性进行了两项独立的研究。在对超导体的第一项研究中，我们将研究电子行为的一个特定方面，寻找一个被称为费米表面的特征表面，这可能是解释为什么这些特定材料以这种方式超导的关键。在第二项研究中，我们建议研究一种化合物的磁性性质，这种化合物的行为被发现是相当不寻常的。希望通过研究磁性是如何分布的，它可以告诉我们一些关于我们理解的差距。

项目成果

Bulk electronic structure of optimally doped Ba ( Fe 1 - x Co x ) 2 As 2

最佳掺杂Ba ( Fe 1 - x Co x ) 2 As 2 的体电子结构

• DOI: 10.1103/physrevb.81.064509
• 发表时间: 2010
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Utfeld C

Ferrimagnetism in Fe-rich NbFe 2

富铁 NbFe 2 中的亚铁磁性

• DOI: 10.1103/physrevb.85.115137
• 发表时间: 2012
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Haynes T