Study of Existing High Temperature Superconductors and Search for New Ones

w：\awards\awards96\*.doc 9804325 Chu 该实验研究项目的重点是高温超导性。 一个方面是对新超导体的经验探索。第二个方面涉及问题和运作机制。 在 的 铜酸 家庭 的 高 高温超导体研究的主题包括电荷储存块的作用、过掺杂区的费米液体或非费米液体行为、更高跃迁的可能性 温度;可能性 的 具有高转变温度的非铜酸盐材料;以及这种化合物的形成和稳定性。合成技术包括高压， 快速 从蒸汽中骤冷，固态的 反应、湿化学和电弧熔化。物理性质，包括结构，运输和磁性测定在环境和高 压力; 其他 性能 是 确定 在合作中。 该研究计划是跨学科的，涉及一名或多名研究生，他们接受了良好的培训，为工业，政府实验室或学术界的职业生涯做准备。 本实验研究项目主要研究高温超导性。 这些研究的大部分涉及含有氧化铜平面的氧化物超导体，如钇钡 氧化铜，YBaCuO 7，具有92开尔文的超导转变温度。一个方面是对新超导体的经验探索。第二个方面涉及问题， 在铜酸盐家族中起作用的机制 的 高温超导体正在调查的主题包括充电水库块的作用;费米液体或非费米液体的行为，在过掺杂制度;更高的转变温度的可能性;非铜酸盐材料的可能性与高transiti on温度;和形成和稳定性，这样的化合物。合成技术包括高压， 快速 从蒸汽中骤冷，固态的 反应、湿化学和电弧熔化。物理性质，包括结构，运输和磁性测定在环境和高 压力; 其他 性能 是 确定 在合作中。 这项研究可能会导致新的超导体在发电，电力传输，电动机的改进技术中的应用 以及传输、能量存储和电子学;包括模数转换器、高速计算机电路和蜂窝电话基站。 该研究计划是跨学科的，涉及一名或多名研究生，他们接受了良好的培训，为工业，政府实验室或学术界的职业生涯做准备。 ***

w:\awards\awards96\*.doc 9804325 Chu This experimental research project focuses on high temperature superconductivity. One aspect is the empirical search for new superconductors. A second aspect deals with issues and mechanisms operative in the cuprate family of high temperature superconductors. Topics under investigation include the role of the charge reservoir block; the Fermi-liquid or non Fermi-liquid behavior in the overdoped regime; the possibility of higher transition temperatures; the possibilities of non-cuprate materials with high transition temperature; and the formation and stability of such compounds. Synthesis techniques include high pressure, rapid quench from vapor, solid-state reaction, wet-chemistry, and arc-melting. Physical properties including structural, transport and magnetic are determined at ambient and high pressures; other properties are determined in collaborations. This research program is interdisciplinary in nature and involves one or more graduate students, who receive excellent training in preparation for careers in industry, government laboratories or academia. %%% This experimental research project focuses on high temperature superconductivity. Much of this research deals with the oxide superconductors containing copper oxide planes such as Yttrium Barium Copper Oxide, YBaCuO7, which has a superconducting transition temperature of 92 Kelvin. One aspect is the empirical search for new superconductors. A second aspect deals with issues and mechanisms operative in the cuprate family of high temperature superconductors. Topics under investigation include the role of the charge reservoir block; the Fermi-liquid or non Fermi-liquid behavior in the overdoped regime; the possibility of higher transition temperatures; the possibilities of non-cuprate materials with high transiti on temperature; and the formation and stability of such compounds. Synthesis techniques include high pressure, rapid quench from vapor, solid-state reaction, wet-chemistry, and arc-melting. Physical properties including structural, transport and magnetic are determined at ambient and high pressures; other properties are determined in collaborations. This research could lead to new superconductors with possibility of applications in improved technologies for electric power generation, electric power transmission, electric motors and transmissions, energy storage, and electronics; including analog to digital converters, high speed computer circuits, and cellular telephone base stations. This research program is interdisciplinary in nature and involves one or more graduate students, who receive excellent training in preparation for careers in industry, government laboratories or academia. ***