钨薄膜中超导小涡束的应力积累和弛豫的直接观测
Direct observation of stress accumulation and relaxation in small bundles of superconducting vortices in tungsten thin-films
摘要：
我们在100 mK下用扫描隧道显微镜和光谱（STM/S）研究了超导涡旋束在增加磁场时的行为。钉扎中心由表面上的特征给出。我们发现，强净涡运动在一个束朝着一个明确的方向。我们观察连续变化的涡安排，并确定小的位移，应力和变形的涡束，分离较大的重新安排或雪崩，释放累积的应力。
英文摘要：
We study the behavior of bundles of superconducting vortices when increasing the magnetic field using scanning tunneling microscopy and spectroscopy (STM/S) at 100 mK. Pinning centers are given by features on the surface corrugation. We find strong net vortex motion in a bundle towards a well defined direction. We observe continuos changes of the vortex arrangements, and identify small displacements, which stress and deform the vortex bundle, separated by larger re-arrangements or avalanches, which release accumulated stress.
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