The interplay of topology with magnetism in Weyl semimetals recently arose to a vanguard topic, because of novel physical scenarios with anomalous transport properties. Here, we address the charge dynamics of the noncentrosymmetric and ferromagnetic (T_C ~ 15 K) PrAlGe material and discover that it harbours electronic correlations, which are reflected in a sizeable reduction of the Fermi velocity with respect to the bare band value at low temperatures (T). At T < T_C, the optical response registers a band reconstruction, which additionally causes a reshuffling of spectral weight, pertinent to the electronic environment of the type-I Weyl fermions and tracing the remarkable anomalous Hall conductivity (AHC). With the support of first-principles calculations, we provide evidence for the intimate relationship between a topological resonance of the absorption spectrum and the progressively enhanced occupation of non-trivial states with large Berry curvatures, a requirement for AHC.

由于具有异常传输特性的新物理场景，外尔半金属中拓扑与磁性的相互作用最近成为一个前沿话题。在这里，我们讨论了非中心对称和铁磁 ( T _C  ~ 15 K) PrAlGe 材料的电荷动力学，并发现它具有电子相关性，这反映在低温下费米速度相对于裸带值的显着降低( T )。在T  <  T _C，光学响应记录了波段重建，这还导致光谱权重的重新洗牌，这与 I 型外尔费米子的电子环境有关，并追踪了显着的异常霍尔电导率 (AHC)。在第一性原理计算的支持下，我们为吸收光谱的拓扑共振与逐渐增强的具有大贝里曲率的非平凡状态的占据之间的密切关系提供了证据，这是 AHC 的要求。