Complex metallic alloys: Electronic instabilities

该提案是Paketantrag“复杂金属合金的物理特性（PPCMA）”的一部分。Paketantrag将复杂金属合金（CMA）作为材料科学的一个新领域，其主要目标是确定和了解各种CMA相的物理特性。Paketantrag在科学上补充了欧洲卓越CMA网络。复杂的金属合金目前以其不同寻常的各种意想不到的物理特性吸引着科学界。第一研究还表明，在CMA的日益复杂的代表了一个新的路线走向出现新的电子properties.We建议系统的研究选定CMA的体属性，以确定电子不稳定性，如超导性，自旋和电荷顺序和绝缘行为。我们进一步建议研究这些材料与主机的中子散射技术，最重要的结构改进，使用冷中子衍射以及中子自旋回波测量超慢自旋动力学在外加磁场。待研究的样本将由Paketantrag（德累斯顿、法兰克福和于利希）的合作小组提供。为了进行这个项目，我们要求博士后的财政支持，用于测量金属绝缘体过渡和消耗品附近的系统的电阻桥。

This proposal is part of the Paketantrag “Physical Properties of Complex Metallic Alloys (PPCMA)”. The Paketantrag addresses Complex Metallic Alloys (CMAs) as a novel field in materials science with the primary goal to determine and understand the physical properties of a wide range of CMA phases. The Paketantrag scientifically complements the European Network of Excellence CMA.Complex metallic alloys currently fascinate the scientific community in terms of an unusual variety of unexpected physical properties. First studies also suggest, that the increasing complexity in CMAs represents a new route towards the emergence of novel electronic properties.We propose systematic studies of the bulk properties of selected CMAs to identify electronic instabilities such as superconductivity, spin and charge order and insulating behaviour. We further propose to study these materials with a host of neutron scattering techniques, most importantly structure refinements using cold neutron diffraction as well as neutron spin-echo measurements of ultra-slow spin dynamics in an applied magnetic field. Samples to be studied will be provided by the partner groups in the Paketantrag (Dresden, Frankfurt and Jülich). To carry out this project we request financial support for a postdoc, a resistance bridge for measurements of systems near a metal insulator transition and consumables.