Magnetic field observation of a single flux quantum by electron-holographic interferometry.
Magnetic field observation of a single flux quantum by electron-holographic interferometry.
复制标题
通过电子全息干涉测量单通量量子的磁场观测。
作者：
Matsuda;Hasegawa;Igarashi;Kobayashi;Naito;Kajiyama;Endo;Osakabe;Tonomura;Aoki
本文利用Aharonov-Bohm效应，用电子全息技术，直接地、个别地观察了单个磁通量子（fluxon）穿透超导薄膜（Pb）的磁力线。电子波的相位轮廓不仅证实了量子化通量值/italh//2/itale/，而且通过相位放大揭示了单个通量子的内部结构。薄膜厚度约为lt/0.5.. Mu.. m时，每个通量在穿透膜后散开或形成返回到膜表面上的另一点的基本形状。对于较厚的膜，通量子形成束，其通量达到几倍/ital h//2/ital e/。
The magneitc lines of force of a single flux quantum (fluxon) penetrating a superconducting film (Pb) were observed directly and individually by the electron holography technique using the Aharonov-Bohm effect. The phase contours of the electron wave not only confirm the quantized flux value /ital h//2/ital e/ but also reveal, by phase amplification, internal structure of a single fluxon. With the film thickness /approx lt/0.5 ..mu..m, each fluxon, after penetrating the film, fans out or makes a /ital ssU/ shape returning to another point on the film surface. With thicker films, fluxons form a bundle with a flux amounting to several times /ital h//2/ital e/.