Synthesis and Properties of New Early Transition Metal Sulfides

本研究的目的是研究合成，结构， 和新的前过渡金属硫化物相的性质。 的 所提出的化合物将具有钙钛矿相关或层结构 和具有d 0至d1构型的过渡金属。 各种 将采用合成技术如BaCl 2助熔剂反应， CS2硫化反应和硫热反应。 所有 化合物将通过XRD、传输和磁性来表征。 测量. 这些化合物将允许比较 同成分氧化物和硫化物的结构和性质 在发生金属绝缘体转变的区域中。 的 结构和共价性在形成新化合物中的重要性 将涉及金属固体。 %%% 本研究的目的是研究合成，结构， 和性质的新类别的未开发的固态材料。 这些化合物将包括前过渡金属（Ti、Zr、Hf、Hf）， V、Nb、Ta）和硫。 尝试将特征设计成 这些已知在氧化铜中重要的材料 超导体 新的原子结构和性质 材料将被确定。 结构的重要性和 在新材料的形成中， 诸如金属行为和/或超导性的性质将 被解决。

The aim of this research is to investigate synthesis, structure, and properties of new early transition metal sulfide phases. The proposed compounds will have perovskite related or layer structures and transition metals with do to d1 configurations. A variety of synthetic techniques will be employed such as BaCl2 flux reactions, CS2 sulfiding reactions, and sulventothermal reactions. All compounds will be characterized by XRD, transport, and magnetic measurements. These compounds will allow comparisons of the structures and properties of isocompositional oxides and sulfides in the areas where metal insulator transitions occur. The importance of structure and covalency in the formation of new metallic solids will be addressed. %%% The aim of this research is to investigate synthesis, structure, and properties of new classes of unexplored solid state materials. These compounds will comprise early transition metals (Ti, Zr, Hf, V, Nb, Ta) and sulfur. Attempts are made to design features into these materials that are known to be important in the copper oxide superconductors. The atomic structure and properties of the new materials will be determined. The importance of structure and bonding in the formation of new materials, with desirable properties such as metallic behavior and/or superconductivity, will be addressed.