Qualitative Identification of the Spin‐to‐Orbital Conversion Mechanism Modulated by Rare‐Earth Nd, Gd, and Ho Metals via Terahertz Emission Measurements. - Liu, Long; Jiang, Tianran; Zhao, Xiaotian; Chen, Ke; Lai, Tianshu; Liu, Wei; Zhang, Zhidong (Advanced Functional Materials, 2024)