تقرير
Flux focusing with a superconducting nano-needle for scanning SQUID susceptometry
| العنوان: | Flux focusing with a superconducting nano-needle for scanning SQUID susceptometry |
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| المؤلفون: | Xiang, B. K., Wang, S. Y., Wang, Y. F., Zhu, J. J., Xu, H. T., Wang, Y. H. |
| المصدر: | Microsystems & Nanoengineering 9:78 (2023) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Physics - Instrumentation and Detectors, Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | Nano-fabricated superconducting quantum interference device (nano-SQUID) is a direct and sensitive flux probe useful for magnetic imaging of quantum materials and mesoscopic devices. Enabled by functionalities of superconductive integrated circuits, nano-SQUID fabricated on a chip is particularly versatile but spatial resolution has been limited by its planar geometry. Here, we use femtosecond-laser 3-dimensional (3D) lithography and print a needle onto a nano-SQUID susceptometer to overcome the limit of a plane-structure. The nano-needle coated with a superconducting shell focuses the flux both from the field coil and the sample. We perform scanning imaging using such a needle-on-SQUID (NoS) device on superconducting test patterns with topographic feedback. The NoS shows improved spatial resolution in both magnetometry and susceptometry over its planarized counterpart. This work serves as a proof-of-principle for the integration and inductive coupling between superconducting 3D nano-structures and on-chip Josephson nano-devices. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1038/s41378-023-00553-9 |
| URL الوصول: | http://arxiv.org/abs/2209.10748 |
| رقم الأكسشن: | edsarx.2209.10748 |
| قاعدة البيانات: | arXiv |
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