Understanding the properties of the rare earth hexaborides - A synergistic approach based on spectroscopy and computational methods

我们项目的目标是共同开发新的实验、计算和理论方法来研究相关电子系统中的复杂紧急现象。我们将集中讨论稀土六硼化物，这些化合物显示出目前社会非常感兴趣的复杂竞争相，包括竞争基态和量子临界。我们的兴趣在于探索4f杂化在化合物性质中的作用。我们建议对4f系列进行系统的研究，以及一些精选的掺杂研究。该方法将结合全方位的科学研究，即最先进的表征和光谱、高性能计算和理论。我们对光谱学的关注将进一步使我们能够观察并可能解开f壳层中存在的不同能量尺度以及它们对本系列物理性质的影响。该项目的成功完成可能有助于更好地了解REB6的具体情况和一般的相关制度。此外，它还可能提供对f电子化合物的定量的、特定于材料的描述，以及它的大量基态，从重费米子顺磁到磁性和轨道顺序。

The goal of our project is to jointly develop new experimental, computational and theoretical methods to study complex emergent phenomena in correlated electronic systems. We will focus on the rare-earth hexaborides, which display complex competing phases that are of great present interest to the community, including competing ground states and quantum criticality. Our interest lies in exploring the role of the 4f hybridization in the properties of the compound. We propose a systematic study across the 4f series as well as some selected doping studies. The methodology will incorporate a full range of scientific inquiry, i.e. state of the art characterization and spectroscopy, high-performance computation and theory. Our focus on spectroscopy will furthermore enable us to observe and possibly disentangle the different energy scales present in the f-shell and their influence on the physical properties in this series. The successful completion of the project might lead to a better understanding of the REB6 in particular and correlated systems in general. It furthermore might provide a quantitative, material-specific description of f-electron compounds with its vast array of ground states from heavy Fermion paramagnetic to magnetic and orbital order.