Complex metallic alloys: Electronic instabilities

复杂金属合金：电子不稳定性

• 批准号: 137031305
• 负责人: Professor Dr. Christian Pfleiderer
• 金额: --
• 依托单位: Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/137031305?language=en
• 关键词: Complex; metallic; alloys; Electronic; instabilities

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.

该提案是Paketantrag“复杂金属合金（PPCMA）的物理性质”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相的物理性质。Paketantrag在科学上补充了欧洲卓越网络CMA。复杂的金属合金以其不同寻常的、意想不到的物理特性而吸引着科学界。第一项研究还表明，cma中日益增加的复杂性代表了一条通往新电子特性出现的新途径。我们建议系统地研究选定的cma的体性质，以确定电子不稳定性，如超导性，自旋和电荷顺序以及绝缘行为。我们进一步建议使用一系列中子散射技术来研究这些材料，最重要的是使用冷中子衍射来改进结构，以及在外加磁场中超慢自旋动力学的中子自旋回波测量。待研究的样本将由Paketantrag的合作小组（德累斯顿、法兰克福和耶<s:1>利希）提供。为了开展这个项目，我们要求资助一个博士后，一个用于测量金属绝缘体过渡和消耗品附近系统的电阻桥。