Charge Density Waves in the Rare Earth Polychalcogenides

9319196阿伦森拟议工作的中心目标是描述层状稀土多硫化物中电荷密度波(CDW)的出现和稳定性。这种方法将合成固态化学成分与晶体结构、电输运和磁化率的物理测量以及对观察到的和预测的CDW相结构扭曲的理论分析结合在一起。通过改变温度、压力、组成和化学计量比，可以连续地控制这一几乎相同结构的化合物家族中的总电子计数和共价性，从而获得CDW稳定性的完整范围。最感兴趣的是识别和描述CDW略微稳定的化合物，因为在这里，最容易识别导致CDW不稳定的潜在作用力，并最终可以用来预测新的CDW材料类别。***

9319196 Aronson The central objective of the proposed work is to delineate the occurrence and stability of Charge Density Waves (CDWs) in the layered rare earth polychalcogenides. This approach combines a synthetic solid-state chemistry component with physical measurements of crystal structure, electrical transport, and magnetic susceptibility and theoretical analyses of observed and predicted structural distortions in the CDW phase. By varying temperature, pressure, composition, and stoichiometry, the overall electron count and covalency in this nearly isostructural family of compounds can be controlled in a continuous manner, accessing the complete range of CDW stability. Of central interest is the identification and description of compounds in which the CDW is marginally stable, for here the underlying forces responsible for the CDW instability are most readily identified and ultimately can be used to predict new classes of CDW materials. ***