Study of Existing High Temperature Superconductors and Search for New Ones

本实验研究项目主要研究高温超导性。一个方面是对新型超导体的实证研究。第二个方面涉及在铜族高温超导体中工作的问题和机制。研究主题包括储层区块的作用；过掺杂状态下的费米-液体或非费米-液体行为；更高转变温度的可能性；高转变温度非铜材料的可能性以及这些化合物的形成和稳定性。合成技术包括高压、蒸汽快速淬火、固态反应、湿化学和电弧熔炼。物理性质包括结构、输运和磁性在环境和高压下测定；其他属性是在协作中确定的。该研究项目是跨学科的，涉及一名或多名研究生，他们接受了优秀的培训，为工业、政府实验室或学术界的职业生涯做准备。这个实验研究项目的重点是高温超导性。这项研究主要涉及含有铜氧化物平面的氧化物超导体，如钇钡铜氧化物，YBaCuO7，其超导转变温度为92开尔文。一个方面是对新型超导体的实证研究。第二个方面涉及在铜族高温超导体中工作的问题和机制。研究主题包括储层区块的作用；过掺杂状态下的费米-液体或非费米-液体行为；更高转变温度的可能性；高过渡温度非铜材料的可能性以及这些化合物的形成和稳定性。合成技术包括高压、蒸汽快速淬火、固态反应、湿化学和电弧熔炼。物理性质包括结构、输运和磁性在环境和高压下测定；其他属性是在协作中确定的。这项研究可能会产生新的超导体，并有可能应用于改进的发电、电力传输、电动机和传动、储能和电子技术；包括模数转换器、高速计算机电路和蜂窝电话基站。该研究项目是跨学科的，涉及一名或多名研究生，他们接受了优秀的培训，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. ***