Manipulation of vortex array via a magnetism-tunable spin-polarized scanning tunnelling microscopy

• DOI: 10.1088/1674-1056/adb38d
• Publication Date: 2025-02-07T10:47:57Z
• Authors: Bing 冰 Xia 夏; Hong-Yuan 虹源 Chen 陈; Jian 健 Zheng 郑; Bo 波 Yang 杨; Jie 杰 Cai 蔡; Yi 毅 Zhang 章; Yi 毅 Yang 杨; Hao 浩 Yang 杨; Dan-Dan 丹丹 Guan 管; Xiao-Xue 晓雪 Liu 刘; Liang 亮 Liu 刘; Yao-Yi 耀义 Li 李; Shi-Yong 世勇 Wang 王; Can-Hua 灿华 Liu 刘; Hao 浩 Zheng 郑; Jin-Feng 金锋 Jia 贾

Abstract Manipulating and braiding Majorana zero modes (MZM) are a critical step toward realizing topological quantum computing. The primary challenge is controlling the vortex, which hosts the MZM, within a superconducting film in a spatially precise manner. To address this, we developed a magnetic force-based vortex control technology using the STM system with a self-designed four-electrode piezo-scanner tube and investigated vortex manipulation on the NbSe2 superconducting film. We employed ferromagnetic tips to control the movement of vortex array induced by the tip’s remanent magnetism. A magnetic core solenoid device was integrated into the STM system and a strong magnetic tip demagnetization technique was developed, providing a viable technical solution for further enabling single vortex manipulation.