Electrodynamics of Superconductors

超导体电动力学

• 批准号: 9223850
• 负责人: Srinivas Sridhar
• 金额: $ 24万
• 依托单位: Northeastern University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-05-15 至 1996-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9223850&HistoricalAwards=false
• 关键词: Electrodynamics; Superconductors

High frequency electrodynamic measurements are used as sensitive probes of the Meissner and mixed states of superconductors. Measurements of the surface resistance and penetration depth at several frequencies in the MHz and GHz ranges will be carried out as a function of temperature and magnetic field. The results will be analyzed to extract information regarding the dynamics of the condensate, quasiparticles and vortices, and will be compared with fundamental models. The materials which will be studied are several of the high and low Tc superconductors. The vortices will be paramaterized and the resulting measurements will be used to test theories of vortex formation, melting, vortex glass, and other thermodynamic states %%% This project explores the response of high temperature superconductors to alternating electric and magnetic fields. The results are expected to be important for both fundamental understanding and for applications of superconducting devices at high frequencies.

高频电动力测量被用作超导体迈斯纳态和混合态的灵敏探头。将在兆赫和千兆赫范围内的几个频率上测量表面电阻和穿透深度，作为温度和磁场的函数。将对结果进行分析，以提取有关凝聚物、准粒子和涡旋的动力学信息，并将与基本模型进行比较。将研究的材料是几种高、低Tc超导体。旋涡将被参数化，结果测量将用于测试旋涡形成、熔化、旋涡玻璃、这个项目探索高温超导体对交变电场和磁场的响应。这一结果对于基础理解和高频超导器件的应用都是重要的。