Vortex Electronics

优先区域“涡旋电子”从1998年到2000年，仅仅三年，直到20世纪末。在此期间，研究项目提出了三个方面的探索：(1)涡旋的基础研究和可视化；(2)涡旋电子学的逐步应用；(3)氧化物和氧化物超导体的先进技术的建立。建立了超短激光脉冲探测方法，通过激光照射调制超电流实现涡旋的可视化和控制。提出了改进的苦涩方法，并对改进后的空间分辨率极限进行了实验验证。通过这一提议，在YBCO和BSCCO中清晰地观察到了HTSC薄膜中涡旋的时间动力学。最突出的成果是在氧化物超导体中发现了带电涡。到目前为止，在金属超导体中，每个人都认为涡旋的正常核心是电中性的。人们发现这个概念不适用于氧化物超导体。采用多种灵敏的方法对涡旋动力学进行了严密的研究，探讨了波动噪声的来源。在此基础上，对低噪声鱿鱼进行了研制和研究。提出并制作了SQUID显微镜、SQUID生物传感器和“Open-SQUID”。高速RSFQ应用在30 GHz左右进行了测试和演示。提出了一种新的PLD技术，并命名为Aurora-PLD。在较低的温度下生长薄膜是非常合适的。

The Priority area "Vortex Electronics" was settled from 1998 to 2000, just for three years until the end of the 20th century. During this period, the research project placed three items to be explored : (1) the basic research and visualization of vortex, (2) progressive application to vortex electronics and (3) establishment of advanced technologies for oxides and oxide superconductors.Ultrashort laser pulse probe method was establihed to visualize and control the vortices via modulation of supercurrent by laser irradiation. Modified Bitter's method was proposed and the improved spatial resolution limit was experimentally verified. Through this proposal, the temporal dynamics of the vortex in the HTSC thin films were observed clearly in YBCO and BSCCO. The most outstanding result was the discovery of charged vortex in the oxide superconductors. So far, in the metal superconductors, every one has believed that the normal-core of the vortex is electrically neutral. This concept was found not to be conveyed to the oxide superconductors.Vortex dynamics were closely investigated by several sensitive methods and explored the origin of fluctuation noise. On the basis of these knowledges, low noise SQUIDs were fabricated and investigated. SQUID microscope, SQUID bio-sensor and "Open-SQUID" were proposed and actually fabricated. High speed RSFQ application was checked and demonstrated at around 30 GHz.New PLD technology was proposed and named Aurora-PLD. It is very suitable to grow thin films at lower temperatures.