Synthesis and Properties of New Early Transition Metal Sulfides

本研究的目的是研究新的早期过渡金属硫化物相的合成、结构和性质。所提出的化合物将具有钙钛矿相关或层状结构和具有do - d1构型的过渡金属。各种合成技术将被采用，如BaCl2通量反应，CS2硫化反应，和磺化反应。所有化合物都将通过XRD，输运和磁测量来表征。这些化合物将允许在金属绝缘体发生转变的区域比较同组分氧化物和硫化物的结构和性质。本文将讨论结构和共价在形成新型金属固体中的重要性。本研究的目的是研究尚未开发的新型固态材料的合成、结构和性能。这些化合物将包括早期过渡金属（Ti, Zr, Hf， V, Nb, Ta）和硫。人们试图在这些材料中设计出对氧化铜超导体很重要的特性。新材料的原子结构和性能将被确定。结构和键合在新材料形成中的重要性，具有理想的性能，如金属行为和/或超导性，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.