标题： 基于InSb纳米旗Josephson结的超导量子干涉器件 显示英文标题

标题： Superconducting Quantum Interference Devices based on InSb nanoflag Josephson junctions

摘要： 基于InSb纳米鳍的平面约瑟夫森结(JJs)最近成为超导电子学中的一个有趣平台。 本文介绍了采用InSb纳米鳍结的超导量子干涉器件(SQUID)的制备与研究。 我们提供了对称和非对称几何结构中干涉图样的测量结果。 这两种配置下的干涉图样均可通过背栅电压进行调制，这一特性也通过数值模拟得到了很好的再现。 观测到的行为与结的偏斜电流相位关系一致，显示出高次谐波的重要贡献。 我们探索了器件在较宽磁场范围（$\pm 30$ 毫特斯拉）内的磁场响应，直至单结干涉区域，在该区域检测到了类似弗劳恩霍费尔的模式。 最后，我们评估了SQUID的磁通-电压灵敏度，以评价它们作为磁强计的性能。 发现磁通噪声为$S^{1/2}_\Phi = 4.4 \times 10^{-6} \Phi_0 / \sqrt{Hz}$，表明其在纳米尺度磁强计中有潜在应用。 显示英文摘要

摘要： Planar Josephson junctions (JJs) based on InSb nanoflags have recently emerged as an intriguing platform in superconducting electronics. This letter presents the fabrication and investigation of superconducting quantum interference devices (SQUIDs) employing InSb nanoflag JJs. We provide measurements of interference patterns in both symmetric and asymmetric geometries. The interference patterns in both configurations can be modulated by a back-gate voltage, a feature well reproduced through numerical simulations. The observed behavior aligns with the skewed current-phase relations of the JJs, demonstrating significant contributions from higher harmonics. We explore the magnetic field response of the devices across a wide range of fields ($\pm 30$ mT), up to the single-junction interference regime, where a Fraunhofer-like pattern is detected. Finally, we assess the flux-to-voltage sensitivity of the SQUIDs to evaluate their performance as magnetometers. A magnetic flux noise of $S^{1/2}_\Phi = 4.4 \times 10^{-6} \Phi_0 / \sqrt{Hz}$ is identified, indicating potential applications in nanoscale magnetometry.