Enhanced superconducting-vortex diode effect in a superconductor/antiferromagnet heterostructure
Xinyi Zheng, Ruihuan Duan, Desheng Wu, Xilin Feng, Xue Yang, Lihong Hu, Lei Xu, Sicheng Zhou, Siyuan Zhou, Ximing Zhang, Bingbing Tong, Ziwei Dou, Zhaozheng Lyu, Xiaohui Song, Peiling Li, Jie Shen, Jianlin Luo, Xiunian Jing, Fanming Qu, Zheng Liu, Kam Tuen Law, Guangtong Liu, Li Lu
DOI 10.1103/mksg-lj91 · Physical Review Applied
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Abstract
Superconducting diodes, characterized by unidirectional flow of supercurrents, are promising components for low-power quantum circuits. In this work, we demonstrate a field-controlled superconducting rectifier in a van der Waals heterostructure comprising an Ising superconductor NbSe2 and an antiferromagnetic insulator MnPS3. Our devices display key features of a superconducting-vortex-diode effect, including a characteristic M-shaped dependence of the critical current Ic on out-of-plane magnetic fields Bz, and an antisymmetric diode efficiency η with respect to Bz. The second-harmonic magnetotransport measurements confirm that the observed nonreciprocity originates from the strongly asymmetric vortex dynamics, which are significantly enhanced compared to pristine few-layer NbSe2. We attribute the enhancement to an inversion symmetry breaking induced by the spatially distributed superconducting domains due to the inhomogeneous magnetic proximity effect. Our findings bring insights for developing superconducting-vortex diodes that do not rely on artificial edge or surface disorder to achieve asymmetric barriers for vortex motion.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6 | Pressure not reported | onset |
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