Direct observation of rectified motion of vortices in a niobium superconductor.
Direct observation of rectified motion of vortices in a niobium superconductor.
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DOI：
10.1103/physrevlett.95.087002
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发表时间：
2005-08
影响因子：
8.6
通讯作者：
Y. Togawa;K. Harada;T. Akashi;H. Kasai;T. Matsuda;F. Nori;A. Maeda;A. Tonomura
中科院分区：
文献类型：
--
作者：
Y. Togawa;K. Harada;T. Akashi;H. Kasai;T. Matsuda;F. Nori;A. Maeda;A. Tonomura
利用洛伦兹显微镜直接成像涡旋，我们研究了铌超导体中的涡旋运动控制和整流。我们直接观察到一个净运动的漩涡沿着微通道与空间不对称的潜力，即使是由振荡场驱动的漩涡。通过观察旋涡的个别运动，我们澄清了这一整流所涉及的基本过程。为了进一步证明控制涡流运动的能力，我们创建了一个微小的涡流“跑道”来监测闭合回路通道中涡流的运动。
Using Lorentz microscopy to directly image vortices, we investigate vortex motion control and rectification in a niobium superconductor. We directly observe a net motion of vortices along microfabricated channels with a spatially asymmetric potential, even though the vortices were driven by an oscillatory field. By observing the individual motion of vortices, we clarify elementary processes involved in this rectification. To further demonstrate the ability to control the motion of vortices, we created a tiny vortex "racetrack" to monitor the motion of vortices in a closed circuit channel.