SPP 1458: High Temperature Superconductivity in Iron Pnictides

FeAs化合物高温超导性的发现引起了世界范围内的广泛关注，并引发了固体物理和固体化学领域的大量研究活动。这种兴趣是由于（1）高达55 K的大转变温度，（2）非常丰富的物理性质，表现出晶体结构，磁性和超导性之间有趣的相互作用，（3）在这类新的高温超导体中材料的多样性，以及（4）这些金属间化合物的技术应用潜力。本优先计划的目的是研究FeAs高温超导性的材料和机制。通过系统的材料研究，其目的是合成已知材料的高质量样品以及寻找新的超导组合物。结合实验和理论研究，计划研究磷属元素化物的基本物理性质，特别是探索这类新的高温超导体的机制。这项研究计划的一个重要方面将是化学家和物理学家之间的密切跨学科合作，或者换句话说，材料优化和基础研究之间的相互作用。从事化学和/或材料科学的小组将建立新的系统，并优化样品质量。物理性质的彻底表征以及由理论和/或实验物理学工作组进行的理论建模不仅将深入了解pnictides的基本性质，而且还将为合成工作的优化和新方向提供重要建议。

The discovery of high temperature superconductivity in FeAs-compounds has attracted worldwide attraction and triggered an enormous amount of research activities in both, solid state physics and solid state chemistry. This interest is due to (1) the large transition temperatures up to 55 K, (2) the very rich physical properties, which exhibit an interesting interplay between crystal structure, magnetism and superconductivity, (3) the large diversity of materials in this new class of high temperature superconductors, and (4) the potential of technical applications of these intermetallic compounds. It is the intention of this Priority Programme to study materials and mechanisms of FeAs high temperature superconductivity. With a systematic materials study it is aimed to synthesise high quality samples of known materials as well as to search for new superconducting compositions. With a combination of experimental and theoretical investigations it is planned to study the basic physical properties of the pnictides and, in particular, to explore the mechanism of this new class of high temperature superconductors. An important aspect of this research initiative will be the close interdisciplinary collaboration between chemists and physicists, or, in other words, the interaction between materials optimisation and fundamental research. The groups working in chemistry and/or materials science will establish new systems and will optimise the sample quality. The thorough characterisation of the physical properties as well as the theoretical modelling performed by groups working in theoretical and/or experimental physics will not only give insights to the fundamental properties of the pnictides, but will, in addition, give important suggestions to the optimisation and new directions in the synthesis work.