Electrodynamics of Proximity-Coupled and Cuprate Superconductors

目标是：了解超导体（SC）接近效应的基本性质，利用这种理解来设计定性的新型超导材料，并通过其微波表面阻抗（MSI）研究铜超导的物理特性。薄膜形式和块状形式的低tc和高tc SC材料将被制备和表征。MSI将由该小组开发的两种共振技术来测量。这项研究将有助于我们对低tc超导性、铜酸盐基态波函数的对称性、波动对铜酸盐物理性质的影响等问题有更深入的认识，并有助于澄清掺杂电子的铜酸盐的物理性质，以及超导体的一些新应用。在科学家探索极低温领域的过程中，许多有趣的现象被揭示出来，超导性就是其中之一。其中最令人惊讶的特征之一是“邻近效应”，即超导体有时可以在附近的正常材料中诱导超导性。在这个项目中，我们将进行旨在加深我们对这种效应和超导性的理解的实验，并设计出定性的新超导材料。＊＊＊

9624021 Anlage The objectives are: to understand the basic nature of the superconductor (SC) proximity effect, use this understanding to engineer qualitatively new SC materials, and study the physics of cuprate Scs through their microwave surface impedance (MSI). Both low-Tc and high-Tc SC materials, in both thin-film and bulk form, will be prepared and characterized. The MSI will be measured by two resonance techniques developed by the group. The research should lead to our deeper understanding of low-Tc superconductivity, the symmetry of the ground-state wavefunction of cuprate Scs, the influence of fluctuations on the physical properties of cuprates, and a clarification of the physical properties of the rogue electron-doped cuprate SC, as well as some novel applications of superconductors. %%% Superconductivity is one of the many intriguing phenomena that have come to light as scientists have explored the realm of very low temperatures.And one of the most astonishing features has been the "proximity effect" whereby a superconductor can sometimes induce superconductivity in a nearby normal material. In this program, we shall conduct experiments designed to deepen our understanding of this effect and of superconductivity in general, and to engineer qualitatively new superconducting materials. ***