Electrons in superconductors and other quantum states of matter

凝聚态物质：电子结构凝聚态物质：磁性和磁性材料超导是一种状态，在这种状态下，量子力学通常的微观效应被放大，并具有潜在的极其有用的实际应用。在现代凝聚态物理学中，同样令人着迷的物质量子态比比皆是。然而，虽然这些系统的理论通常很发达，但我们对这些材料中实际发生的事情的实验知识存在重大差距。这个项目的目的是弄清楚电子在这些材料中发生转变到有趣的阶段时做了什么。在基态建立的关键临界点发生了什么？在导电材料中实现这一目标的关键是确定费米面，在许多最有趣的系统中，费米面尚未建立。该项目将利用材料生长和提供超高磁场的新发展来探索一系列新系统的电子特性，包括铜酸盐，铁基，拓扑和非中心对称超导体，以及其他显示物质量子态的系统。费米面将确定使用测量的磁量子振荡和角度依赖的磁阻。电子和磁相互作用强度将通过掺杂和/或施加高压力来调整，并研究由此产生的性质变化。实验结果将与现有的理论模型以及在项目过程中开发的模型进行比较。实验将在内部和国际设施进行。

Condensed matter: electronic structureCondensed matter: magnetism and magnetic materialsSuperconductivity is a state in which the usually microscopic effects of quantum mechanics is writ large and has potentially extremely useful real-world applications. Similarly fascinating quantum states of matter abound in modern condensed matter physics. However, while the theories of these systems are often well developed, there are significant gaps in our experimental knowledge about what is actually is happening in these materials. This project aims to figure out what the electrons are doing in these materials at the point at which the transition into the interesting phase occurs. What it is that occurs at the vital tipping point where the ground state is established? Key to this aim in conducting materials is a determination of the Fermi surface, which in many of the most interesting systems is yet to be established. The project will make use of new developments in materials growth and in the provision of ultra-high magnetic fields to explore the electronic properties of a range of novel systems, including cuprate, iron-based, topological and non-centrosymmetric superconductors, as well as other systems that display quantum states of matter. Fermi surfaces will be determined using measurements of magnetic quantum oscillations and angle-dependent magnetoresistance. The electronic and magnetic interaction strengths will be adjusted by doping and/or the application of high-applied pressures and the resulting change in properties investigated. Experimental results will be compared with existing theoretical models as well as those developed during the course of the project. The experiments will performed in-house and at international facilities.