Quasi-Low-Dimensional Reduced Transition Metal Compounds: Synthesis and Characterization

格林布拉特9613106该项目的目标是合成和表征具有准低维性质的新型还原过渡金属化合物。感兴趣的系统包括1)过渡金属(Ta和W)青铜；2)Nb和Re簇合物；以及3)具有ThCr2Si2结构的过渡金属硫属化合物。实验计划的重点是合成处于电子和结构不稳定边缘的强关联电子系统的新材料，并以可控的方式微调通过不稳定区域的竞争电子相互作用。重点将放在单晶样品的制备上，以研究其结构和取向相关的物理性质。将寻找和表征与电荷密度波(CDW)和/或超导开始相关的转变。这些研究有望产生新的材料，提供对相关电子行为的基本见解，并最终允许加强和控制电子不稳定性，从而产生有趣和有用的宏观性质。***

Greenblatt 9613106 The object of this project is the synthesis and characterization of new, reduced-transition metal compounds with quasi-low-dimensional properties. Systems of interest include 1) transition metal (Ta and W) bronzes; 2) niobium, and rhenium cluster compounds; and 3) transition metal chalcogenides with ThCr2Si2 structures. The focus of the experimental program is to synthesize new materials of strongly correlated electron systems that are on the verge of electronic and structural instabilities, and to fine-tune the competing electronic interactions through the unstable region in a controlled way. Particular emphasis will be placed on the preparation of single crystal specimens to study the structural and orientation-dependent physical properties. %%% Transitions associated with the onset of charge-density waves (CDW) and/or super-conductivity will be sought and characterized. These studies are expected to yield novel materials, provide fundamental insights into correlated electronic behavior and ultimately allow the enhancement and control of electronic instabilities that lead to interesting and useful macroscopic properties. ***