Charge Density Waves in the Rare Earth Polychalcogenides

9319196 Aronson拟议工作的中心目标是描绘电荷密度波（CDW）在层状稀土多硫族化物的发生和稳定性。这种方法结合了合成 固态 化学 组件 与 晶体结构、电输运和磁化率的物理测量以及CDW相中观察到的和预测的结构畸变的理论分析。 通过改变温度， 压力、成分和化学计量， 在这类几乎同构的化合物中，总的电子数和共价性可以连续的方式控制，达到CDW稳定性的全部范围。 中心的兴趣是识别和描述的化合物中的CDW是边际稳定的，在这里负责的CDW不稳定性的基本力量是最容易识别，并最终可用于预测新类别的CDW材料。 ***

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. ***