微米级Bi2Sr2CaCu2O8 +y样品中的桥作为涡流的会聚透镜
Bridge in micron-sized Bi2Sr2CaCu2O8+y sample act as converging lens for vortices
摘要：
我们报告直接成像的涡旋物质成核的微米尺寸的Bi 2Sr 2CaCu 2 O 8 +y超导样品，顺便提出一个桥梁结构。我们发现，当成核涡在现场冷却条件下的桥面作为一个会聚透镜的旋涡。通过Bitter装饰图像，我们可以量化桥梁桥面每单位长度的涡-涡相互作用能量的增强，我们可以估计桥面厚度小于0.6\，$μ$ m。我们表明，在微米级薄样品中成核的涡旋物质的结构特性不显着影响样品厚度的变化的顺序为半微米，II型超导体为基础的介观技术设备的一个重要信息。
英文摘要：
We report on direct imaging of vortex matter nucleated in micron-sized Bi2Sr2CaCu2O8+y superconducting samples that incidentally present a bridge structure. We find that when nucleating vortices in a field-cooling condition the deck of the bridge acts as a converging lens for vortices. By means of Bitter decoration images allowing us to quantify the enhancement of vortex-vortex interaction energy per unit length in the deck of the bridge, we are able to estimate that the deck is thinner than 0.6\,$μ$m. We show that the structural properties of vortex matter nucleated in micron-sized thin samples are not significantly affected by sample-thickness variations of the order of half a micron, an important information for type-II superconductors-based mesoscopic technological devices.
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