Anisotropy and Magnetism in the EuFe2As2 Family

EuFe2As2 族的各向异性和磁性

• 批准号: 237770494
• 负责人: Professor Dr. Martin Dressel
• 金额: --
• 依托单位: 1. Physikalisches Institut
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/237770494?language=en
• 关键词: Anisotropy; Magnetism; EuFe2As2; Family

The main difficulty in understanding the novel class of iron-based superconductors comes from the facts that several band cross the Fermi energy and that the metallic state reveals a complex magnetic order. Multiple orbitals complicate the normal state properties as well as the superconducting state. Among the compounds explored in the Priority Programme SPP 1458 the family of EuFe2As2 takes a unique position because the magnetic order in the Eu subsystem influences the magnetic, conducting and superconducting properties that develop in the FeAs subsystem. Our research project proposed here will concentrate on two points by addressing the nematic phase and related anisotropy in the normal and superconducting state, and the interplay of local magnetism and superonductivity with particular emphasis on effect of the localized Eu2+ magnetic moments.

理解新型铁基超导体的主要困难来自于几个能带穿过费米能级以及金属态揭示了复杂的磁序的事实。多个轨道使正常态特性以及超导态变得复杂。在优先计划 SPP 1458 探索的化合物中，EuFe2As2 系列占据独特的地位，因为 Eu 子系统中的磁序影响 FeAs 子系统中产生的磁性、导电和超导特性。我们在这里提出的研究项目将集中在两点上：解决正常和超导状态下的向列相和相关各向异性，以及局域磁性和超导性的相互作用，特别强调局域Eu2+磁矩的影响。