High-mobility two-dimensional carriers originating from surface Fermi arcs in magnetic Weyl semimetals are highly desired for accessing exotic quantum transport phenomena and for topological electronics applications. Here, we demonstrate high-mobility two-dimensional carriers that show quantum oscillations in magnetic Weyl semimetal SrRuO₃ epitaxial films by systematic angle-dependent, high-magnetic field magnetotransport experiments. The exceptionally high-quality SrRuO₃ films were grown by state-of-the-art oxide thin film growth technologies driven by machine-learning algorithm. The quantum oscillations for the 10-nm SrRuO₃ film show a high quantum mobility of 3.5 × 10³ cm²/Vs, a light cyclotron mass, and two-dimensional angular dependence, which possibly come from the surface Fermi arcs. The linear thickness dependence of the phase shift of the quantum oscillations provides evidence for the non-trivial nature of the quantum oscillations mediated by the surface Fermi arcs. In addition, at low temperatures and under magnetic fields of up to 52 T, the quantum limit of SrRuO₃ manifests the chiral anomaly of the Weyl nodes. Emergence of the hitherto hidden two-dimensional Weyl states in a ferromagnetic oxide paves the way to explore quantum transport phenomena for topological oxide electronics.

源自磁性外尔半金属中的表面费米弧的高迁移率二维载流子对于访问奇异的量子传输现象和拓扑电子学应用是非常需要的。在这里，我们通过系统的角度相关的高磁场磁输运实验展示了高迁移率二维载流子，该载流子在磁性 Weyl 半金属 SrRuO _{3外延薄膜中显示出量子振荡。}极其优质的 SrRuO ₃薄膜是通过机器学习算法驱动的最先进的氧化物薄膜生长技术生长的。10-nm SrRuO ₃薄膜的量子振荡显示出 3.5 × 10 ³  cm ^{2的高量子迁移率}/Vs，轻回旋加速器质量和二维角度依赖性，可能来自表面费米弧。量子振荡相移的线性厚度依赖性为由表面费米弧介导的量子振荡的非平凡性质提供了证据。此外，在低温和高达52 T的磁场下，SrRuO ₃的量子极限表现出Weyl节点的手性异常。迄今为止隐藏的二维外尔态在铁磁氧化物中的出现为探索拓扑氧化物电子学的量子传输现象铺平了道路。