发表机构
Idaho National Laboratory; Uppsala University; Lawrence Berkeley National Laboratory; Harvard University; Institute of Low Temperature and Structure Research, Polish Academy of Sciences（爱达荷国家实验室; 乌普萨拉大学; 劳伦斯伯克利国家实验室; 哈佛大学; 波兰科学院低温与结构研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过输运、光电子能谱和第一性原理计算，揭示了铀Weyl半金属UPS中磁有序、电子关联重构与反常霍尔输运在不同温度范围分阶段涌现的机制。
AI 中文摘要
理解电子关联如何重塑拓扑态仍是量子材料领域的核心挑战。在此，我们通过磁输运、角分辨光电子能谱、热力学测量和第一性原理计算研究了铀铁磁体UPS。共振光电子能谱揭示了费米能级处窄的U-$5f$谱权重与宽的非相干态共存，这与铀$5f$电子的巡游/局域二象性特征一致。反常霍尔电导率达到约$4.5\times10^{2}\\,\Omega^{-1}\mathrm{cm}^{-1}$，但并不简单地跟随有序磁矩。变温光电子能谱显示，在$T_C=118$~K附近变化相对较小，随后在约90~K以下出现低能$5f$谱权重的显著重新分布。第一性原理计算识别出一个具有显著贝里曲率的对称性保护的Weyl交叉点，并给出约$9.6\times10^{2}\\,\Omega^{-1}\mathrm{cm}^{-1}$的本征反常霍尔电导率。这些结果表明，磁有序、关联电子重构和反常霍尔输运在截然不同但重叠的温度范围内发展，揭示了强关联如何重塑铀Weyl半金属中的拓扑输运。
英文摘要
Understanding how electronic correlations reshape topological states remains a central challenge in quantum materials. Here we investigate the uranium ferromagnet UPS using magnetotransport, angle-resolved photoemission spectroscopy, thermodynamic measurements, and first principles calculations. Resonant photoemission reveals narrow U-$5f$ spectral weight at the Fermi level coexisting with broad incoherent states, consistent with the itinerant/localized duality characteristic of uranium $5f$ electrons. The anomalous Hall conductivity reaches approximately $4.5\times10^{2}\,Ω^{-1}\mathrm{cm}^{-1}$, yet does not simply follow the ordered magnetic moment. Temperature dependent photoemission reveals relatively little change across $T_C=118$~K, followed by a pronounced redistribution of low-energy $5f$ spectral weight below approximately 90~K. First-principles calculations identify a symmetry protected Weyl crossing with pronounced Berry curvature and yield an intrinsic anomalous Hall conductivity of approximately $9.6\times10^{2}\,Ω^{-1}\mathrm{cm}^{-1}$. These results demonstrate that magnetic order, correlated electronic reconstruction, and anomalous Hall transport develop over distinct but overlapping temperature ranges, revealing how strong correlations reshape topological transport in a uranium Weyl semimetal.
Comments11 pages, 9 Figures
