Synthesis, Characterization, and Physical Properties of Metal Chalcogenides

9709351 Ibers本项目旨在合成、表征和研究固态金属硫族化合物的物理性质，硫族化合物是一类含有硫、硒或碲的材料。待调查的领域包括(a)第四族金属的三元和四元硫属化合物；(b)季稀土硫系化合物；(c)这些材料表现出的结构畸变，以及相应的能带结构计算；(d)铼的硫属化合物。新材料的表征将包括单晶x射线方法的结构测定和输运性质的测量，特别是电导率和磁化率。由于硫族化合物可能提供丰富的新材料来源，因此扩大这些化合物的合成是很重要的，因为它们可能是具有可预测的化学、结构和性能/结构关系的技术相关新材料的可能来源。最终目标是通过整合研究和教育的学生作为未来的科学家和工程师能够提供新型的固态材料，表现出半导体，绝缘体，或磁性。＊＊＊

9709351 Ibers This project aims at the synthesis, characterization, and study of physical properties of solid-state metal chalcogenides, which are a class of materials that contain sulfur, selenium or tellurium. Among areas to be investigated are (a) ternary and quaternary chalcogenides of the Group IV metals; (b) quaternary rare-earth chalcogenides; (c) structural distortions exhibited by these materials, and the corresponding band-structure calculations; (d) chalcogenides of rhenium. Characterization of the new materials will include structure determinations by single- crystal X-ray methods and the measurement of transport properties, especially electrical conductivity and magnetic susceptibility. %%% Since it is felt that the chalcogenides may provide a rich source of novel materials, it is important to expand the synthesis of these compounds as a possible source of technologically relevant new materials with predictable chemistry, structure and property/structure relationships. The ultimate goal is to provide through the integration of research and education students as future scientists and engineers able to provide novel classes of solid-state materials that exhibit semiconductor, insulator, or magnetic properties. ***