论文部分内容阅读
四年前,高温超导体首次发现以后,大量的高温超导材料相继问世。然而,其中仅有一种特殊类型的材料即薄膜超导体接近于现实应用。因为薄膜超导体较之块状超导体(比如金属导线)可以携载大得多的电流,该性能可导致薄膜超导体在快速通讯系统,电子元件,跟踪大脑活性传感器以及其他领域的应用。为什么仅有薄膜材料才能携载高额电流呢?科学家认为其物理机制至今尚属“神秘莫测”。然而最近有两个科学研究小组的研究对解开这个谜产生了轰动效应。这两个小组利用扫描遂道显微镜(STM)和原子强制显微镜(AFM)作为观察原子分子图象的工具,他们通过对薄膜的观察不容置疑地发现了分布在薄膜表面的螺旋粒状的“森林”。科学家认为这些逗弄人的“螺旋林”(Spiral Forest)绝不是什么艺术制品,相
Four years ago, after the first discovery of high-temperature superconductors, a large number of high-temperature superconducting materials came out one after another. However, only one special type of material, thin film superconductor, is close to practical applications. Because thin film superconductors can carry much larger currents than bulk superconductors, such as metal wires, this property can lead to the use of thin film superconductors in fast communication systems, electronic components, tracking of brain activity sensors, and other fields. Why only thin-film materials can carry high current? Scientists believe that its physical mechanism is still “mysterious.” However, recent research by two scientific research groups has had a sensational effect on solving this mystery. The two groups used Scanning Tunneling Microscopy (STM) and Atomic Formic Microscopy (AFM) as a tool for observing atomic molecular images. They undoubtedly found helical grainy “forests” distributed on the surface of the film by observing the film . Scientists think these teaser Spiral Forests are by no means art