Persky Eylon, Kremen Anna, Wissberg Shai, Shperber Yishai, Kalisky Beena
Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University.
Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University;
J Vis Exp. 2017 Feb 1(120):54986. doi: 10.3791/54986.
Local, deterministic manipulation of individual vortices in type 2 superconductors is challenging. The ability to control the position of individual vortices is necessary in order to study how vortices interact with each other, with the lattice, and with other magnetic objects. Here, we present a protocol for vortex manipulation in thin superconducting films by local contact, without applying current or magnetic field. Vortices are imaged using a scanning superconducting quantum interference device (SQUID), and vertical stress is applied to the sample by pushing the tip of a silicon chip into the sample, using a piezoelectric element. Vortices are moved by tapping the sample or sweeping it with the silicon tip. Our method allows for effective manipulation of individual vortices, without damaging the film or affecting its topography. We demonstrate how vortices were relocated to distances of up to 0.8 mm. The vortices remained stable at their new location up to five days. With this method, we can control vortices and move them to form complex configurations. This technique for vortex manipulation could also be implemented in applications such as vortex based logic devices.
对II型超导体中的单个涡旋进行局部确定性操控具有挑战性。为了研究涡旋如何相互作用、与晶格相互作用以及与其他磁性物体相互作用，控制单个涡旋的位置是必要的。在此，我们展示了一种通过局部接触在薄超导薄膜中操控涡旋的方法，无需施加电流或磁场。使用扫描超导量子干涉装置（SQUID）对涡旋进行成像，并通过使用压电元件将硅芯片的尖端压入样品，对样品施加垂直应力。通过轻敲样品或用硅尖端扫过样品来移动涡旋。我们的方法能够有效操控单个涡旋，而不会损坏薄膜或影响其形貌。我们展示了涡旋如何被重新定位到最远0.8毫米的距离。涡旋在其新位置保持稳定长达五天。通过这种方法，我们可以控制涡旋并将它们移动以形成复杂的构型。这种涡旋操控技术也可应用于基于涡旋的逻辑器件等应用中。
