Vortex Motion in Patterned Superconductors

这项实验计划拨款涉及与II型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钉电位（孔阵列）中的涡流运动，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流的量子隧穿是可观的条件。因此，该计划是对涡旋的量子和经典隧穿速率及其对涡旋钉住势细节的依赖进行定量研究。这项拨款支持计划研究超导体薄膜中磁通量（涡旋线）的运动。本课题与II型超导体的载流能力有关，II型超导体允许零电阻状态持续存在（允许电能无损耗传输），即使在存在磁场的情况下。高温铜超导体属于这一类，在这项资助下计划进行的研究可能有助于改进电力传输技术的发展，也有助于改进电动机和发电机。＊＊＊

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. ***