Vortex confinement through an unquantized magnetic flux

IF 8.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Npg Asia Materials Pub Date : 2024-09-06 DOI:10.1038/s41427-024-00564-6

Geunyong Kim, Jinyoung Yun, Jinho Yang, Ilkyu Yang, Dirk Wulferding, Roman Movshovich, Gil Young Cho, Ki-Seok Kim, Garam Hahn, Jeehoon Kim

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Abstract

Geometrically confined superconductors often experience a breakdown in the quantization of magnetic flux owing to the incomplete screening of the supercurrent against field penetration. In this study, we report that magnetic field confinement occurs regardless of the dimensionality of the system, even extending to 1D linear potential systems. By using a vector-field magnetic force microscope, we successfully create a vortex‒antivortex pair connected by a 1D unquantized magnetic flux in ultrathin superconducting films. Through an investigation of the manipulation and thermal behavior of the vortex pair, we uncover a long-range interaction mediated by the unquantized magnetic flux. These findings suggest a universal phenomenon of unquantized magnetic flux formation, independent of the geometry of the system. Our results present an experimental route for investigating the impact of confinement on superconducting properties and order parameters in unconventional superconductors characterized by extremely low dimensionality.

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通过非量化磁通的涡约束

由于超电流对磁场穿透的屏蔽不完全，几何约束超导体通常会出现磁通量化崩溃。在这项研究中，我们发现磁场约束的发生与系统的维度无关，甚至可以扩展到一维线性势系统。通过使用矢量场磁力显微镜，我们成功地在超薄超导薄膜中创建了由一维非量化磁通连接的涡旋-反涡旋对。通过研究涡旋对的操纵和热行为，我们发现了一种由非量化磁通介导的长程相互作用。这些发现表明，非量化磁通的形成是一种普遍现象，与系统的几何形状无关。我们的研究结果为研究约束对超导特性的影响和以极低维度为特征的非常规超导体中的有序参数提供了一条实验途径。

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来源期刊

Npg Asia Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

15.40

自引率

1.00%

发文量

审稿时长

2 months

期刊介绍： NPG Asia Materials is an open access, international journal that publishes peer-reviewed review and primary research articles in the field of materials sciences. The journal has a global outlook and reach, with a base in the Asia-Pacific region to reflect the significant and growing output of materials research from this area. The target audience for NPG Asia Materials is scientists and researchers involved in materials research, covering a wide range of disciplines including physical and chemical sciences, biotechnology, and nanotechnology. The journal particularly welcomes high-quality articles from rapidly advancing areas that bridge the gap between materials science and engineering, as well as the classical disciplines of physics, chemistry, and biology. NPG Asia Materials is abstracted/indexed in Journal Citation Reports/Science Edition Web of Knowledge, Google Scholar, Chemical Abstract Services, Scopus, Ulrichsweb (ProQuest), and Scirus.