Vortex Motion in Patterned Superconductors

9705353 Zieve这项实验计划拨款涉及与第二类超导体中涡旋运动有关的研究。PI将利用纳米制造技术的最新进展来研究周期性钉扎势(孔阵列)中的涡旋运动，其特征尺寸(孔间距和孔直径)可以扩展到以前无法达到的范围。其中一个目标是达到涡旋的量子隧道可察觉的条件。因此，该计划将对涡旋的量子隧穿速率和经典隧穿速率进行定量研究，以及它们对涡旋钉扎势细节的依赖。%这笔赠款支持对超导体薄膜中磁通(涡旋线)运动的研究计划。这个话题对于第二类超导体的载流能力很重要，这种超导体即使在磁场存在的情况下也能保持零电阻状态(允许无损耗传输电能)。高温铜酸盐超导体就属于这一类，根据这项赠款计划的研究可能有助于开发改进的电力传输技术，也有助于改进电机和发电机。***

9705353 Zieve This experimental planning grant involves research related to the motion of vortices in Type II superconductors. The PI will exploit recent advances in nanofabrication technology to study the motion of vortices in periodic pinning potentials (arrays of holes) whose characteristic dimensions (hole spacing and hole diameters) can extend to ranges previously inaccessible. One of the objectives is to reach conditions where quantum tunneling of vortices is appreciable. Thus, the plan is to perform quantitative study of both quantum and classical tunneling rates of vortices, and their dependence on details of the vortex pinning potential. %%% This grant supports planning for a study of the motion of magnetic flux (vortex lines) in a thin film of superconductor. This topic is important in connection with the current carrying capacity of superconductors of Type II, which allow a zero resistance state to persist (allowing loss free transmission of electrical energy) even in the presence of a magnetic field. High temperature cuprate superconductors are of this class, and the research being planned under this grant may contribute to the development of an improved technology for the electrical power transmission, and also for improved electrical motors and generators. ***