Studies of High-Tc and Buckminsterfullerene Superconductors Under High Hydrostatic Pressure

高静压下高温和巴克明斯特富勒烯超导体的研究

• 批准号: 9509885
• 负责人: James Schilling
• 金额: $ 24.34万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-08-01 至 1998-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9509885&HistoricalAwards=false
• 关键词: Studies; Tc; Buckminsterfullerene; Superconductors; Under

9509885 Schilling This project will search for oxygen ordering in High-Tc oxide superconductors in order to determine the essential structural and cation characteristics responsible for the ordering. Temperature dependent oxygen relaxation phenomena will also be examined in detail. An objective is to establish any link between these phenomena and photo-induced superconductivity. The functional dependence of the superconductor transition temperature and the electronic density of state in fullerene superconductors such as K3C60 and Ru3C60 will also be investigated. The project will focus on the pressure dependence of the transition temperatures as well as the Pauli spin susceptibility. This project is devoted to a fundamental study of superconductivity, however, the results may be of technical interest in the context of pressure effects on high-Tc and related materials. %%% In a typical high-temperature superconductor, approximately half of the constituent atoms are oxygen. These atoms, via there arrangement in the crystal lattice, sensitively influence the temperature at which a material becomes a superconductor. This project is devoted to the study of the oxygen atoms, and their ordering (arrangement) in the high-Tc materials lattice. The materials will be studied as a function of both temperature and pressure (these are important thermodynamic variables for the high-Tc materials). The methods will also be applied to another interesting superconductor material: "fullerenes", which contain potassium or rubidium. The experiments, which probe how the conducting properties of the materials vary with temperature and pressure, will yield information that will be of considerable interest to theorists. The project is of a fundamental nature, but may have technical relevance if it leads to new routes to higher temperature superconductors. ***

9509885 Schilling这个项目将寻找高Tc氧化物超导体中的氧有序，以确定基本的结构和性质。 阳离子 负责的特征 命令。 温度依赖性的氧弛豫现象也将详细研究。目的是确定这些之间的任何联系 现象 和 光致超导 功能 依赖 的 的 超导体 富勒烯超导体的转变温度和电子态密度 例如K3C60和Ru3C60 将 也 追究 该项目将侧重于转变温度的压力依赖性以及泡利自旋磁化率。该项目致力于超导性的基础研究，然而，其结果可能在高Tc和相关材料的压力效应方面具有技术意义。 在典型的高温超导体中，大约一半的组成原子是氧。这些原子通过在晶格中的排列，敏感地影响材料成为超导体的温度。 本计画致力于研究高温超导材料晶格中的氧原子及其排列。 材料将作为温度和压力的函数进行研究（这些是高Tc材料的重要热力学变量）。这些方法也将应用于另一种有趣的超导体材料：“富勒烯”，它含有钾或铷。这些实验探索了材料的导电特性如何随温度和压力而变化，将产生理论家相当感兴趣的信息。该项目是一个基本的性质，但如果它导致更高温度超导体的新路线，可能具有技术相关性。 ***