Research Initiation: Fundamental Studies & Device Applications of Superconductors at Rf, Microwave & MM-Wave Frequencies (REU Supplement)

该研究启动奖侧重于高转变温度超导体的高频电磁研究，频率范围从“直流”到75千兆赫。拟开展的工作包括：(1)通过测量表面电阻和穿透深度作为温度、频率和外加磁场的函数，对电磁响应进行基础研究。这些结果将被解释为产生关于超导状态性质的基本信息，以及这些材料中涡流和流体的动力学。(2)整体、单晶、涂层材料的制造和加工。研究材料加工对超导体理想高频响应的影响。(3)大块单片和涂层器件的制造和测试。将研究的具体器件有：微波和毫米波频率的高Q全超导腔，数字间滤波器，以及x波段和更高频率的波导。将确定器件性能，与预期的理想估计相关联，并检查材料加工的影响。

This Research Initiation Award focusses on high frequency electromagnetic studies of high-transition-temperature superconductors, between frequencies covering "dc" to 75 GHz. The proposed work involves: (1) Fundamental studies of the electromagnetic response via measurements of the surface resistance and the penetration depth as functions of temperature, frequency and applied magnetic field. The results will be interpreted to yield fundamental information regarding the nature of the superconducting state, and the dynamics of vortices and fluxoids in these materials. (2) Materials fabrication and processing in bulk monolithic, single crystal forms and also coatings. The effects of materials processing on the ideal high frequency response of the superconductors will be studied. (3) Fabrication and testing of devices in bulk monolithic and coated forms. The specific devices that will be studied are: high Q fully superconducting cavities at microwave and mmwave frequencies, interdigital filters, and waveguides at X-band and higher frequencies. the device performance will be determined, correlated with expected ideal estimates, and the effects of materials processing will be examined.